Overview — Part XVIII of the Constitution

Part XVIII (Articles 352 to 360) of the Indian Constitution contains emergency provisions that grant the Union extraordinary powers during situations threatening the nation's security, governance, or financial stability. These provisions convert India's federal structure into a unitary one during emergencies.

Type of EmergencyArticleGrounds
National Emergency352War, external aggression, or armed rebellion
State Emergency (President's Rule)356Failure of constitutional machinery in a state
Financial Emergency360Threat to financial stability or credit of India

1. National Emergency (Article 352)

Grounds for Proclamation

The President can proclaim a National Emergency when the security of India or any part of its territory is threatened by:

  • War — actual armed conflict with a foreign state
  • External aggression — threat or attack from a foreign power
  • Armed rebellion — violent revolt within the country

A proclamation can also be issued if the President is satisfied that there is imminent danger of any of the above, even before the actual occurrence.

Key Change: The original Constitution used the term "internal disturbance" as the third ground. The 44th Amendment Act, 1978 replaced it with the stricter term "armed rebellion" to prevent misuse of emergency powers for ordinary law-and-order situations.

Procedure for Proclamation

StepRequirement
Cabinet adviceThe President can proclaim emergency only on the written recommendation of the Union Cabinet (not merely the Prime Minister) — safeguard added by the 44th Amendment
Presidential proclamationPresident issues the proclamation; it may relate to the whole of India or a part of it (38th Amendment, 1975 allowed part-of-territory proclamation)
Parliamentary approvalMust be approved by both Houses of Parliament within 1 month of issue (reduced from 2 months by the 44th Amendment)
DurationContinues for 6 months at a time; can be extended indefinitely with parliamentary approval every 6 months
Special majority for extensionEach resolution of continuation must be passed by a special majority — majority of total membership of the House AND two-thirds of members present and voting (44th Amendment)
RevocationPresident may revoke anytime; must revoke if Lok Sabha passes a resolution disapproving the continuation (44th Amendment). 1/10th of Lok Sabha members can requisition a special sitting for this purpose, and the Speaker must give 14 days' notice

Effect on Fundamental Rights

Article 358 — Automatic Suspension of Article 19:

  • When a National Emergency is proclaimed on grounds of war or external aggression only (not armed rebellion), the six Fundamental Rights under Article 19 are automatically suspended.
  • The State can make any law or take any executive action that would otherwise violate Article 19 rights.
  • After the 44th Amendment, Article 358 does not operate during an emergency declared on the ground of armed rebellion.
  • Laws made under Article 358 must recite a connection to the emergency (44th Amendment safeguard).

Article 359 — Suspension of Enforcement of Other Rights:

  • The President may, by order, suspend the right to move any court for enforcement of Fundamental Rights (except Articles 20 and 21) during the emergency.
  • This suspension is not automatic — it requires a separate Presidential order.
  • After the 44th Amendment, Articles 20 and 21 cannot be suspended under any circumstances — the right to life and personal liberty, and protection against ex post facto laws and double jeopardy, remain enforceable even during an emergency.

Prelims Trap: Article 358 operates automatically but only during war/external aggression. Article 359 requires a Presidential order and can cover other rights — but Articles 20 and 21 are always protected. These are frequently confused in MCQs.


2. History of National Emergency in India

India has witnessed three proclamations of National Emergency:

#Date of ProclamationGroundPrime MinisterRevoked
126 October 1962External aggression (Sino-Indian War)Jawaharlal Nehru10 January 1968
23 December 1971External aggression (Indo-Pakistan War)Indira Gandhi21 March 1977
325 June 1975Internal disturbanceIndira Gandhi21 March 1977

The 1962 Emergency

Proclaimed during the Sino-Indian War when Chinese forces launched a full-scale invasion across the Line of Actual Control. The emergency remained in force long after the ceasefire (November 1962) and was formally revoked only on 10 January 1968 — over 5 years after the war ended.

The 1971 Emergency

Declared on 3 December 1971 when Pakistan launched pre-emptive air strikes on Indian airfields, triggering the Indo-Pakistan War during the Bangladesh Liberation War. The war ended with Pakistan's surrender on 16 December 1971, but the emergency proclamation was not revoked and continued alongside the third emergency until 21 March 1977.

The 1975 Internal Emergency

President Fakhruddin Ali Ahmed proclaimed a state of emergency on the night of 25 June 1975 on the advice of Prime Minister Indira Gandhi, citing "internal disturbance" as the ground. This remains the most controversial use of emergency powers in Indian history.

Key facts:

  • The Allahabad High Court had invalidated Indira Gandhi's 1971 election on 12 June 1975 (State of Uttar Pradesh v. Raj Narain), creating a political crisis
  • Civil liberties were suspended; press censorship was imposed
  • Opposition leaders including Jayaprakash Narayan, Morarji Desai, and Atal Bihari Vajpayee were arrested under preventive detention
  • The 42nd Amendment (1976) was passed during this period, making sweeping changes to the Constitution
  • Elections were held in March 1977; the Janata Party defeated the Congress
  • The emergency was formally revoked on 21 March 1977

The 1975 Emergency was the direct trigger for the 44th Amendment Act, 1978, which introduced comprehensive safeguards against future misuse of emergency powers.


3. President's Rule — State Emergency (Article 356)

Grounds

The President can impose President's Rule in a state if satisfied, on the basis of the Governor's report or otherwise, that the governance of the state cannot be carried on in accordance with the provisions of the Constitution.

Effects of President's Rule

EffectDetail
State government dismissedThe President assumes the functions of the State Government; the Council of Ministers is dissolved
State legislature suspended or dissolvedThe state legislature may be suspended or dissolved; Parliament exercises legislative power for the state
Governor administersThe Governor carries on administration on behalf of the President, aided by advisers appointed by the President
High Court powers unaffectedThe powers of the High Court remain intact

Parliamentary Approval and Duration

StageTime Limit
Initial approvalMust be approved by both Houses of Parliament within 2 months
Normal durationContinues for 6 months at a time
Maximum normal durationCan be extended up to 1 year with parliamentary approval every 6 months
Extension beyond 1 yearPermitted up to a maximum of 3 years, but only if both conditions are met: (a) a National Emergency is in operation in the whole or any part of the state, AND (b) the Election Commission certifies that elections cannot be held in the state

The 44th Amendment (1978) introduced the restriction on extension beyond one year, requiring both the national emergency condition and the Election Commission certification — to prevent indefinite misuse of Article 356 for political purposes.

S.R. Bommai v. Union of India (1994) — The Landmark Judgment

The 9-judge bench of the Supreme Court in S.R. Bommai v. Union of India (1994) 3 SCC 1 laid down critical principles on the use of Article 356:

PrincipleRuling
Judicial reviewThe proclamation under Article 356 is subject to judicial review — the Court can examine whether the material existed for the satisfaction of the President
Floor test is paramountThe majority of a government must be tested on the floor of the Assembly, not on the subjective opinion of the Governor
Secularism is basic structureA state government acting against secular principles can be a valid ground for Article 356
Dissolution only after Parliamentary approvalThe state assembly should not be dissolved until Parliament has approved the proclamation; until then, it should only be suspended
Burden of proofThe burden of proving that the proclamation was valid lies on the Union Government

Impact: Before the Bommai judgment (1950-1994), President's Rule was imposed about 100 times (average 2.5 times per year). After the judgment (1995-2021), it has been imposed only about 29 times (roughly once a year), demonstrating the deterrent effect of judicial review.


4. Financial Emergency (Article 360)

Grounds

The President can declare a Financial Emergency if satisfied that the financial stability or credit of India or any part of its territory is threatened.

Procedure

StepRequirement
ProclamationIssued by the President
Parliamentary approvalMust be approved by both Houses within 2 months
DurationContinues indefinitely until revoked — no periodic parliamentary renewal required
RevocationCan be revoked by the President at any time; does not require parliamentary approval for revocation

Effects of Financial Emergency

  • The Union can direct any state to observe canons of financial propriety as specified
  • The Union can direct reduction of salaries and allowances of all persons serving in the state, including judges of High Courts
  • The President may direct reduction of salaries of all Union officials, including judges of the Supreme Court and High Courts
  • All Money Bills and Financial Bills passed by state legislatures may be reserved for the President's consideration

Never Proclaimed: A Financial Emergency has never been declared in India's history. Even during the severe 1991 balance-of-payments crisis — when India had only two weeks' worth of import cover and pledged gold reserves to avoid default — Article 360 was not invoked.


5. The 44th Amendment Act, 1978 — Safeguards Against Emergency Misuse

The 44th Amendment, passed by the Janata Party government after the 1975 Emergency, introduced the most significant safeguards:

SafeguardPre-44th AmendmentPost-44th Amendment
Ground for National EmergencyWar, external aggression, or internal disturbanceWar, external aggression, or armed rebellion
Cabinet advicePM alone could advise PresidentWritten advice of the Union Cabinet required
Parliamentary approval timelineWithin 2 monthsWithin 1 month
Majority for continuationSimple majoritySpecial majority (majority of total membership + two-thirds of members present and voting)
Revocation by Lok SabhaNo provisionLok Sabha can pass resolution of disapproval to force revocation; 1/10th members can requisition special session
Article 19 suspension (Art. 358)During any emergencyOnly during war or external aggression (not armed rebellion)
Articles 20 & 21Could be suspendedCannot be suspended under any circumstances
Right to propertyFundamental Right (Article 31)Converted to legal right (Article 300A) — removing one motivation for emergency misuse
President's Rule extensionCould be extended indefinitelyMaximum 3 years with conditions (EC certification + national emergency)

6. Landmark Cases on Emergency Provisions

Minerva Mills v. Union of India (1980)

AspectDetail
CitationAIR 1980 SC 1789
Bench5 judges; majority verdict 4:1 (Justice P.N. Bhagwati dissenting)
IssueConstitutional validity of Sections 4 and 55 of the 42nd Amendment Act, 1976
HeldStruck down Section 4 (which expanded Article 31C to give primacy to all DPSPs over Fundamental Rights under Articles 14 and 19) and Section 55 (which gave Parliament unlimited amending power under Article 368) as unconstitutional
SignificanceReaffirmed the basic structure doctrine — Parliament's amending power is limited; it cannot use a limited power to grant itself unlimited power. Reinforced the balance between Fundamental Rights and Directive Principles

S.R. Bommai v. Union of India (1994)

AspectDetail
Citation(1994) 3 SCC 1
Bench9 judges
Key holdingsArticle 356 is subject to judicial review; floor test is the only valid way to determine majority; secularism is part of the basic structure; assembly should not be dissolved before parliamentary approval of the proclamation
ImpactDramatically reduced the misuse of President's Rule; established that the federal structure is a basic feature of the Constitution

Rameshwar Prasad v. Union of India (2006)

AspectDetail
BackgroundBihar Assembly was dissolved in May 2005 after the February 2005 elections produced a hung assembly; Governor Buta Singh recommended dissolution citing horse-trading concerns
Key holdingsThe dissolution was unconstitutional — the Governor must make meaningful efforts to explore the possibility of forming a government before recommending dissolution; the power of dissolution under Article 356 cannot be used to prevent a political party from staking claim to form government
SignificanceExtended the Bommai principles — reinforced that President's Rule and dissolution of state assemblies are subject to judicial review; the Governor's report must be based on objective material

7. Comparison — National vs State vs Financial Emergency

FeatureNational Emergency (Art. 352)President's Rule (Art. 356)Financial Emergency (Art. 360)
GroundsWar, external aggression, armed rebellionFailure of constitutional machinery in a stateThreat to financial stability or credit of India
Proclaimed onWritten advice of Union CabinetGovernor's report or otherwisePresident's satisfaction
Parliamentary approvalWithin 1 monthWithin 2 monthsWithin 2 months
Duration6 months, renewable indefinitely6 months, max 3 years (with conditions)Indefinite until revoked
Majority for approvalSpecial majoritySimple majoritySimple majority
Effect on state governmentState government continues but Union gets concurrent powersState government dismissed; Governor administersState government continues but Union controls state finances
Effect on Fundamental RightsArt. 19 suspended (war/external aggression only); other rights may be suspended by Presidential order (except Art. 20, 21)No suspension of Fundamental RightsNo suspension of Fundamental Rights
Effect on legislatureParliament can legislate on State List subjectsParliament legislates for the state; state legislature suspended or dissolvedState money/finance bills reserved for President
Times proclaimed3 times (1962, 1971, 1975)Over 125 timesNever

8. UPSC Relevance — Exam Strategy

Prelims Focus Areas

  • Distinction between Articles 352, 356, and 360 — grounds, approval timelines, majorities
  • Difference between Article 358 (automatic, only war/external aggression) and Article 359 (needs Presidential order, Articles 20 & 21 protected)
  • 44th Amendment changes — "armed rebellion" replacing "internal disturbance", written cabinet advice, special majority for continuation, 1-month approval window
  • Financial Emergency has never been proclaimed
  • Maximum duration of President's Rule (3 years with conditions)

Mains Focus Areas

  • Critical analysis of the 1975 Emergency and constitutional safeguards introduced afterward
  • S.R. Bommai judgment and its impact on Centre-State relations and federalism
  • Tension between emergency powers and federalism — is the Indian Constitution truly federal during emergencies?
  • Recommendations of the Sarkaria Commission (1988) on Article 356 and the Bommai Court's endorsement of those principles
  • Role of the Governor as a neutral constitutional authority vs. agent of the Centre
  • Whether Article 356 should be repealed or further reformed

Key Connections for Answer Writing

  • Link emergency provisions to federalism — how emergencies convert the quasi-federal structure into a unitary one
  • Link to basic structure doctrine — Bommai held that secularism and federalism are part of basic structure; emergency powers cannot destroy them
  • Link to accountability and transparency — the 44th Amendment strengthened parliamentary oversight as a democratic safeguard
  • Link to judicial review — the evolution from non-justiciability (pre-Bommai) to full judicial review of emergency proclamations

Recent Developments (2024–2026)

President's Rule in Manipur — Ethnic Violence, Article 356 Invoked (February 2025)

President's Rule (State Emergency under Article 356) was imposed in Manipur on 13 February 2025 following the resignation of Chief Minister N. Biren Singh. Manipur had been experiencing violent ethnic conflict between the Meitei and Kuki-Zo-Hmar communities since May 2023, resulting in hundreds of deaths and displacement of over 60,000 people. The Union Home Minister supervised the transition; the Manipur Governor Ajay Kumar Bhalla (appointed January 2025, former Union Home Secretary) submitted a report under Article 356.

The Lok Sabha approved the initial six-month period of President's Rule (Article 356(3) requires Parliamentary approval within two months), and subsequently approved a further six-month extension from 13 August 2025. This is the 11th time President's Rule has been imposed in Manipur — the state with the highest number of President's Rule impositions in Indian history.

UPSC angle: Prelims — Manipur President's Rule February 2025; 11th imposition; S.R. Bommai (1994) safeguards; Article 356(3) requires Parliamentary approval within 2 months. Mains — evaluate whether President's Rule was the appropriate constitutional response to Manipur's ethnic crisis; assess the Bommai safeguards in preventing misuse.

No National Emergency Under Article 352 — Constitutional Checks Remain Robust (2024–2025)

No National Emergency under Article 352 (war, external aggression, or armed rebellion) was proclaimed in 2024–2025. India's security environment continued to be managed through standard legal frameworks (AFSPA in certain areas, UAPA for terrorism). The 44th Amendment's requirements for Article 352 (written Cabinet recommendation to President, Cabinet-level approval, Lok Sabha approval by special majority within one month) have served as effective deterrents since 1978.

India has not proclaimed a National Emergency since the 1975–1977 Internal Emergency (which led to the 44th Amendment's stringent procedural safeguards).

UPSC angle: Prelims — 44th Amendment (1978) safeguards for Article 352; Cabinet written recommendation required; Lok Sabha special majority + majority of total membership. Mains — evaluate the effectiveness of the 44th Amendment's safeguards; has the framework adequately protected against arbitrary proclamation of National Emergency?

Article 356 — Multi-State Governor Controversies (2024–2025)

While President's Rule was imposed only in Manipur, multiple states (Tamil Nadu, Kerala, Punjab, West Bengal) faced constitutional crises involving their Governors that raised latent Article 356 concerns. In Tamil Nadu, the Governor's prolonged withholding of bills (2021–2024) raised questions about whether this constituted a "failure of constitutional machinery" under Article 356 — or whether Article 356 was being threatened as a political weapon.

The Supreme Court's April 2024 ruling (Tamil Nadu Governor case) and the subsequent November 2025 Presidential Reference ruling clarified the Governor's powers under Article 200 without triggering Article 356, suggesting that the courts prefer judicial remedies over the blunt instrument of President's Rule for bill-withholding disputes.

UPSC angle: Prelims — Article 356 as last resort; Bommai safeguards. Mains — critically examine the multi-state Governor controversies of 2024–2025 in the context of Article 356; when, if ever, would withholding of Governor's assent constitute "failure of constitutional machinery"?

Operation Sindoor — Constitutional Powers of Armed Forces (May 2025)

In May 2025, India launched Operation Sindoor — a military action against terrorist infrastructure in Pakistan-administered Kashmir following a deadly terrorist attack at Pahalgam in April 2025 that killed 26 tourists. The military action was conducted under the executive powers of the Union under Article 73 read with Article 246 (Defence: Entry 1, Union List). No National Emergency was proclaimed under Article 352, as the government relied on existing statutory frameworks.

The constitutional significance: Article 352 was not invoked even during active cross-border military action, illustrating that its threshold is extremely high and its political costs prohibitive.

UPSC angle: Prelims — Article 352 threshold (armed rebellion, external aggression, war); Article 73 (executive power extends to matters Parliament can legislate); Entry 1 Union List (defence). Mains — analyse the distinction between executive war-making power under Article 73 and the emergency power under Article 352; when must the latter be proclaimed?


Vocabulary

Proclamation

  • Pronunciation: /ˌprɒkləˈmeɪʃən/
  • Definition: A formal public announcement or official declaration issued by the President under constitutional authority, such as the proclamation of a National Emergency under Article 352 or President's Rule under Article 356.
  • Origin: From late Middle English, via Old French from Latin prōclāmātiō, from prōclāmāre ("to shout forth"), from prō- ("forth") + clāmāre ("to cry out").

Martial Law

  • Pronunciation: /ˈmɑːʃəl lɔː/
  • Definition: The imposition of direct military control over normal civil functions of government, typically in response to war or civil disorder — distinct from a constitutional emergency, and not explicitly defined in the Indian Constitution though mentioned in Article 34.
  • Origin: From Middle English martial, from Latin mārtiālis ("of or pertaining to Mars, the Roman god of war") + Middle English lawe, from Old Norse lagu ("law").

Curfew

  • Pronunciation: /ˈkɜːfjuː/
  • Definition: A governmental order restricting the movement of persons in public places during specified hours, typically imposed during emergencies or periods of civil unrest to maintain public order.
  • Origin: From Middle English curfu, from Old French cuevre-fu (modern French couvre-feu), literally "cover fire" — from covrir ("to cover") + fu ("fire") — originally a medieval regulation requiring fires to be extinguished at a signal bell.

Key Terms

National Emergency

  • Pronunciation: /ˈnæʃənəl ɪˈmɜːdʒənsi/
  • Definition: An extraordinary constitutional measure under Article 352 whereby the President, on the written advice of the Union Cabinet (not merely the PM — safeguard added by 44th Amendment), proclaims that the security of India or any part thereof is threatened by war, external aggression, or armed rebellion — requiring parliamentary approval within one month by special majority (majority of total membership + two-thirds of members present and voting), renewable every six months with the same special majority. A proclamation can be issued even on the basis of "imminent danger" before actual occurrence. The President must revoke the proclamation if the Lok Sabha passes a resolution of disapproval; one-tenth of Lok Sabha members can requisition a special sitting for this purpose (Speaker must give 14 days' notice).
  • Context: The emergency provisions were derived from the Government of India Act, 1935 (Sections 102-104) and influenced by the Weimar Constitution of Germany. National Emergency has been proclaimed 3 times: (1) 26 October 1962 — external aggression (Sino-Indian War, PM Nehru, revoked 10 January 1968); (2) 3 December 1971 — external aggression (Indo-Pakistan War/Bangladesh Liberation War, PM Indira Gandhi, revoked 21 March 1977); (3) 25 June 1975 — "internal disturbance" (proclaimed by President Fakhruddin Ali Ahmed on PM Indira Gandhi's advice amid a political crisis following the Allahabad High Court's invalidation of her 1971 election on 12 June 1975, revoked 21 March 1977). The 1975 Emergency was the direct trigger for the 44th Amendment Act, 1978, which introduced comprehensive safeguards: (a) replaced "internal disturbance" with the stricter term "armed rebellion"; (b) required written advice of the Union Cabinet (not PM alone); (c) reduced parliamentary approval window from 2 months to 1 month; (d) required special majority for each continuation resolution (previously simple majority); (e) gave Lok Sabha the power to force revocation by resolution; (f) Article 358 (automatic suspension of Article 19) now applies only during war or external aggression — not during armed rebellion; (g) Articles 20 and 21 can never be suspended under any circumstances (Article 359 protection); (h) laws made during emergency must recite a connection to the emergency.
  • UPSC Relevance: GS2 Polity — Prelims: Article 352, three grounds (war, external aggression, armed rebellion — "internal disturbance" was the original term replaced by 44th Amendment), written Cabinet advice required (not PM alone), 1-month approval window (changed from 2 months), special majority for approval and each continuation, Articles 20 and 21 never suspended, Article 358 (automatic suspension of Art. 19 — only during war/external aggression, NOT armed rebellion) vs Article 359 (suspension of enforcement of other FRs — requires separate Presidential order, Arts 20/21 always protected), proclaimed 3 times (1962, 1971, 1975), Financial Emergency (Art. 360) has never been proclaimed; Mains: critical analysis of the 1975 Emergency — how it exposed the vulnerability of constitutional safeguards, the 44th Amendment as the corrective response, does National Emergency convert India's quasi-federal structure into a unitary one (Parliament can legislate on State List subjects under Art. 250), tension between emergency powers and basic structure (Bommai held federalism and secularism are basic structure), comparison of India's emergency provisions with those of other democracies (France's state of emergency, US martial law powers).

President's Rule

  • Pronunciation: /ˈprɛzɪdənts ruːl/
  • Definition: The imposition of direct Union government control over a state under Article 356 when the President, on the basis of the Governor's report or otherwise, is satisfied that the governance of the state cannot be carried on in accordance with the provisions of the Constitution. The state executive authority passes to the President (exercised through the Governor with appointed advisers), the Council of Ministers is dissolved, and the state legislature may be suspended or dissolved — with Parliament exercising legislative power for the state. Requires parliamentary approval within 2 months by simple majority. Fundamental Rights are not suspended and High Court powers remain unaffected — distinguishing it from National Emergency.
  • Context: Inherited from Section 93 of the Government of India Act, 1935. Normal duration is 6 months, extendable to a maximum of 3 years — but extension beyond 1 year requires both: (a) a National Emergency in operation in the whole or part of the state, and (b) Election Commission certification that elections cannot be held (44th Amendment safeguard). President's Rule has been imposed over 130 times since 1950 — averaging about 2.5 times per year before the S.R. Bommai v. Union of India (1994) judgment, and roughly once a year thereafter. The 9-judge bench in Bommai ((1994) 3 SCC 1) imposed critical safeguards: (1) Article 356 is subject to judicial review — courts can examine whether material existed for the President's satisfaction; (2) the floor of the House is the only valid test of majority — not the Governor's subjective assessment; (3) the state assembly should not be dissolved until Parliament approves the proclamation (only suspension permitted until then); (4) secularism is part of the basic structure — a state government acting against secular principles can be valid ground for Article 356; (5) the burden of proving validity lies on the Union Government. Rameshwar Prasad v. UOI (2006) extended Bommai principles — holding that the Governor must make meaningful efforts to explore government formation before recommending dissolution. The Sarkaria Commission (1988) recommended Article 356 be used "sparingly" and only as a "last resort"; the Punchhi Commission (2010) proposed a "localised emergency" affecting only specific districts rather than the entire state.
  • UPSC Relevance: GS2 Polity — Prelims: Article 356, parliamentary approval within 2 months by simple majority, maximum 3 years (with conditions after 1 year — EC certification + National Emergency), imposed over 130 times, Governor's report or "otherwise," Fundamental Rights not suspended, High Court unaffected, state legislature suspended or dissolved; Mains: S.R. Bommai (1994) as the most important judgment on Article 356 — its five key principles and their dramatic impact on reducing misuse, misuse of President's Rule as a tool for political interference by the Centre, should Article 356 be repealed (Punchhi's "localised emergency" as alternative), Sarkaria's "last resort" recommendation, Rameshwar Prasad (2006) on Bihar dissolution, comparison of National Emergency (Art. 352) vs President's Rule (Art. 356) vs Financial Emergency (Art. 360) in terms of grounds, approval, duration, and effects.