You searched for: “abrogation
abrogation (s) (noun), abrogations (pl)
1. The cancellation or nullification of something in a formal and official way: The abrogation of the treaty took place when there was evidence which suggested that the other nations had failed to honor the agreements.
2. An official or legal cancellation because of the failure of someone to do what is required: The company lost the government contract when the abrogation of their costs of construction exceeded the limits.

Congress was expected to have an abrogation of the tax law.