[Code of Federal Regulations] [Title 19, Volume 2] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 19CFR145.57] [Page 87] TITLE 19--CUSTOMS DUTIES CHAPTER I--UNITED STATES CUSTOMS SERVICE, DEPARTMENT OF THE TREASURY PART 145--MAIL IMPORTATIONS--Table of Contents Subpart E--Restricted and Prohibited Merchandise Sec. 145.57 Regulations of other agencies. Certain types of plants and plant products, food, drugs, cosmetics, hazardous or caustic and corrosive substances, viruses, serums, and various harmful articles are subject to examination and clearance by appropriate agencies before release to the addressee (see part 12 of this chapter).