Kan. Admin. Regs. § 9-7-12
(a) Except as provided in subsection (b), each buffalo or bison that enters the state of Kansas shall be accompanied by an official health certificate and shall have tested negative for brucellosis within the preceding 30 days, if the buffalo or bison meets one of the following criteria.
(3) It is a bull that is 12 months of age or older.
(b)(1) Before any buffalo or bison from the greater Yellowstone area is imported into the state of Kansas, the veterinarian in the state of origin who issues the health certificate shall obtain a permit from the Kansas animal health department. "Greater Yellowstone area" means Yellowstone national park and a 20-mile zone surrounding Yellowstone national park.
(Authorized by K.S.A. 47-607d, 47-610, and 47-620; implementing K.S.A. 47-610 and 47-620; effective Jan. 1, 1971; amended Jan. 23, 1998.)