7 CFR 351.1: Joint treatment generally.

The entry into the United States of certain plants, plant products, and soil is prohibited or restricted through various orders, quarantines, and regulations promulgated by the Administrator of the Animal and Plant Health Inspection Service (APHIS) under the authority of the Plant Protection Act (7 U.S.C. 7701-7772). To assist in enforcing the aforementioned orders, quarantines, and regulations, the Plant Protection and Quarantine Programs of APHIS have made provisions with the U.S. Postal and Customs Services to ensure closer inspection of prohibited or restricted imported articles.