Until recently, little attention has been given to whether states and other actors comply with the agreements they negotiate. The assumption has been that most states comply with most international law most of the time. There is, however, strong reason to question this assumption. As was apparent in the Breard case, which involved implementation and compliance with the consular convention, states do not necessarily comply with the international agreements they join, particularly when they involve implementation at the provincial/state and local levels.
Edith B. Weiss,
Understanding Compliance with International Environmental Agreements: The Baker's Dozen Myths,
U. Rich. L. Rev.
Available at: https://scholarship.richmond.edu/lawreview/vol32/iss5/5