Quick search by citation:

7 U.S. Code § 7718 - Certification for exports

The Secretary may certify as to the freedom of plants, plant products, or biological control organisms from plant pests or noxious weeds, or the exposure of plants, plant products, or biological control organisms to plant pests or noxious weeds, according to the phytosanitary or other requirements of the countries to which the plants, plant products, or biological control organisms may be exported.

Statutory Notes and Related Subsidiaries
Transfer of Functions

For transfer of functions of the Secretary of Agriculture relating to agricultural import and entry inspection activities under this chapter to the Secretary of Homeland Security, and for treatment of related references, see sections 231, 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6.