Any person who operates a stockyard, poultry slaughter facility, or any other premises where livestock or poultry are repeatedly assembled: (i) shall maintain such premises in a sanitary condition as directed by the State Veterinarian; (ii) shall obey all orders or regulations adopted pursuant to this chapter as to handling livestock or poultry that may be affected with contagious or infectious disease, or that have been exposed to contagious or infectious disease; and (iii) shall clean and disinfect such premises or vehicles used in connection therewith, or any part thereof, when ordered to do so by the State Veterinarian or his representative.