Which law requires federal registration of pesticides shipped in interstate commerce?

The correct answer is FIFRA, which stands for the Federal Insecticide, Fungicide, and Rodenticide Act. This law is crucial in the regulation of pesticides in the United States. It mandates that any pesticide that is to be shipped or sold in interstate commerce must be registered with the federal government. This registration process ensures that pesticides meet specific safety and efficacy standards before they can be marketed.

By requiring federal registration, FIFRA helps protect human health and the environment from potential harmful effects of untested or unsafe pesticides. The act also allows for the monitoring of pesticide usage and impacts, contributing to informed regulatory decisions.

The other options represent different legislation or concepts not primarily focused on the registration of pesticides for interstate commerce, which helps clarify why FIFRA is the most relevant choice for this question.