Abrogation refers to the formal repeal or annulment of a law, regulation, or policy. It is a legal process that can occur through legislative action, judicial decisions, or executive orders. When a law is abrogated, it is no longer in effect and cannot be enforced. In the context of international law, abrogation can also apply to treaties. A country may choose to abrogate a treaty if it no longer aligns with its interests or if the terms are deemed unacceptable. This process often involves negotiations and can lead to diplomatic consequences.