9 CFR §78.33

1. (a)Sows and boars may be moved in interstate commerce for slaughter or for sale for slaughter if they are identified in accordance with § 71.19 of this chapter either:
   1. (1)Before being moved in interstate commerce and before being mixed with swine from any other source; or
   2. (2)After being moved in interstate commerce but before being mixed with swine from any other source only if they have been moved directly from their herd of origin to:
      1. (i)A recognized slaughtering establishment; or
      2. (ii)A stockyard, market agency, or dealer operating under the Packers and Stockyards Act, as amended (7 U.S.C. 181 et seq.).
2. (b)Sows and boars may be moved in interstate commerce for breeding only if they are identified in accordance with § 71.19 of this chapter before being moved in interstate commerce and before being mixed with swine from any other source, and the sows and boars either:
   1. (1)Are from a validated brucellosis-free herd or a validated brucellosis-free State and are accompanied by a certificate that states, in addition to the items specified in § 78.1, that the swine originated in a validated brucellosis-free herd or a validated brucellosis-free State; or
   2. (2)Have tested negative to an official test conducted within 30 days prior to interstate movement and are accompanied by a certificate that states, in addition to the items specified in § 78.1, the dates and results of the official tests.
3. (c)Sows and boars may be moved in interstate commerce for purposes other than slaughter or breeding without restriction under this subpart if they are identified in accordance with § 71.19 of this chapter.