NATURE OF PUBLIC INTERNATIONAL
LAW
NurhalidaMohamed Khalil
Faculty of Law, University of Malaya
Definition of Public International Law (PIL)
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A system of rules and principles that regulate conduct of states and international
organizations.
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Also certain conduct of individuals, but only to very limited extent
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“ThevariousdevelopmentssincethetwoWorldWarsnolongercountenancethe
viewthat,asamatterofpositivelaw,Statesaretheonlysubjectsofinternational
law.Inproportionastherealizationofthefactsgainsground,therebeanin
increasingdispositiontotreatindividuals,withinalimitedsphere,assubjectsof
internationallaw’’–H.Lauterpacht
PIL and the Centrality of the State
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Thestateaslegalperson
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Statesasprimarysubjectsofinternationallaw
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Historically,statesonlysubjectsofinternationallaw
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TreatyofWestphalia1648
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InternationalorganizationsnowimportantsubjectsofPIL
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Individuals:internationalhumanrightslawandinternationalcriminallaw
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Corporationsenjoyingstandingpursuanttotreaty
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ProliferationofsubjectsofPIL
PIL and the Centrality of the State
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Thestateasterritorially-boundedsovereignty:
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notionofstateterritory
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cujusregioejusreligio
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PILregulatingcertainaspectsofstate’sconductwithinitsterritory
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state’sexercisingsupremeauthoritywithinitsterritory
PIL and the Centrality of the State
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TheSovereignEqualityofStates:
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nopowerinherentlysupremeoverit
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parinparemnonhabetimperium
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anothercentralorganizingconceptofinternationallegalorder
International Law and the Domestic Analogy
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Institutionsoflegalsystemofmodernliberalstateininternational
system?
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Otherfeaturesofinternationallegalsystems,e.g.suigeneris
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Mechanismsanalogoustomechanismsofmodernliberalstate
International Law: Compliance and Enforcement
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Complexissueofstates’compliancewithinternationallawandthe
settlementofinter-statedisputeisacomplexissue
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Directlyrelatedtoconceptofstatesovereignty
International Law: Compliance and Enforcement
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Isinternationallawworking?
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Howareinternationalruleslaiddowninthefirstplace?
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UndeniableproblemsofcompliancewithandenforcementofPIL
International Law: Compliance and Enforcement
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WhydostatesobeyIL?
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stabilityandpredictabilityintheirrelationswithotherStates
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ensureotherStates’compliancewiththeirobligations
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itisineveryState’sintereststoabidebytheruleoflaw
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theneedtoprotectcommonanduniversalhumanvalues
Loss of Legal Rights and Privileges
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Violation resulting in loss of corresponding legal rights and privileges
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Termination of diplomatic relations, restriction of economic aid or
cancellation of supply agreements
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A state’s unlawful action causing the community at large to impose
penalties
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Methods of enforcement causing embarrassment and hardship to the
delinquent state
Peaceful Settlement of Disputes
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Article33UnitedNationsCharter:
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negotiation,enquiry,mediation,conciliation,arbitration,judicialsettlement,
resorttoregionalagenciesorarrangements,or“otherpeacefulmeansof
theirownchoice
The Binding Authority of International Law
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Statefreetoassumelimitationonsovereignty,thisbeing
expressionofsovereignty:‘TheSSWimbledon’
Scope of IL
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The rules and principles of international law are increasingly important to the functioning of our
interdependent world and include areas such as:
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telecommunications, postal services and transportation (such as carriage of goods and passengers)
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international economic law (including trade, intellectual property and foreign investment)
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international crimes and extradition
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human rights and refugee protection
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the use of armed force by States and non-State actors
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counter-terrorism regulation
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nuclear technology
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protection of the environment
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use of the sea, outer space and Antarctica