A bill to amend the Agricultural Act of 1949 to limit the quantity of milk protein products that may be imported into the United States.

Amends the Agricultural Act of 1949 to limit annual imports of milk protein products (casein) to 50 percent of the average annual amount imported during the period 1981 through 1985.

Directs the Secretary of Agriculture to establish a preferential import licensing system for such products based on the availability of domestic substitutes.