Modifies a noun

• interference: According to consolidation theory, retroactive interference should have a greater adverse effect of recently formed memories than older ones.

• pricing: The United Nations began last year to try to quash Iraq's surcharges by imposing a system of retroactive pricing on Iraqi oil.

• effect: The Law of 1945 was clearly, it was held, intended to have a retroactive effect in permitting the death sentence.

• legislation: The Commission is currently considering whether to propose retroactive legislation.

• application: Prodigy has contended that the CDA should govern this case by retroactive application.

• taxis: List the company into a single slap retroactive taxes retained the tort.

Used with adjective complement

• make: The seizure was made retroactive to the day of the occupation of the territory by the German troops.