Agreement Between the Government of the United States of America and the Government of Canada on Air Quality (March 13, 1991)

Countries/Territories	Entry into force	Ratification *
United States of America	Mar 13, 1991	Mar 13, 1991 [6]
Canada	Mar 13, 1991	Mar 13, 1991 [6]

* [1] Ratification [2] Accession/approbation [3] Acceptance/approval [4] Succession [5] Consent to be bound [6] Definite signature