PUBLIC LAW II:
Public International
Law
Prof. Dr. Gleider Hernández
Professor of Public International Law
Institute for International
Law Faculty of Law, KU
Leuven
,Objectives of Today’s Lecture
o Discuss the sources of international law
o Distinguish between primary and
secondary sources of law
o Discern between sources of law and sources
of obligation
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, On sources and validity of legal
rules
o How do we know what is, and what is not, law?
o How did a given legal rule come to have
that status?
o Is there a person or a body empowered to
make, interpret, or change the law?
o Formal versus material sources
• Formal: binding on addressees
• Material: not binding but evidence of a rule
o Introducing Article 38
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