1. Registration required. A person that is not licensed under section 2514 must register under this section if the person is a:
A. Custom slaughterer, except that itinerant custom slaughterers who slaughter solely at a customer's home or farm and who do not own, operate or work at a slaughtering plant are exempt from the registration provisions of this section;
B. Custom processor;
C. Poultry producer that processes fewer than 1,000 birds annually under section 2517‑C;
C-1. Rabbit producer that processes fewer than 1,000 rabbits annually under section 2517‑E; or
D. Person in any other category that the commissioner may by rule establish.