PUBLIC LAW II:
Public International
Law
Prof. Dr. Gleider
Hernández
Professor of Public International Law
Institute for International
Law Faculty of Law, KU
Leuven
2020-2021
,Structure of Today’s Lecture
o Peremptory Norms
• Norms of jus cogens
• Obligations erga
omnes
o Theoretical relationship between national and
international law
• Municipal legal rules in international law
• International law in different domestic legal orders
2
, Hierarchy in international
law
o ‘Relative normativity’ relates to the
nature, structure and content of
international law
o Raises whether there is a hierarchy of norms
in international law, a consent-based system
o If all sources of international law are non-
hierarchical, can relative normativity change
this?
o Hierarchy as different from principles of
conflict resolution (e.g. lex posterior and lex
specialis) 3
Public International
Law
Prof. Dr. Gleider
Hernández
Professor of Public International Law
Institute for International
Law Faculty of Law, KU
Leuven
2020-2021
,Structure of Today’s Lecture
o Peremptory Norms
• Norms of jus cogens
• Obligations erga
omnes
o Theoretical relationship between national and
international law
• Municipal legal rules in international law
• International law in different domestic legal orders
2
, Hierarchy in international
law
o ‘Relative normativity’ relates to the
nature, structure and content of
international law
o Raises whether there is a hierarchy of norms
in international law, a consent-based system
o If all sources of international law are non-
hierarchical, can relative normativity change
this?
o Hierarchy as different from principles of
conflict resolution (e.g. lex posterior and lex
specialis) 3
