Each Class A Licensee shall:

1. (1) Isolate all dogs and cats received from sources within or outside of the Commonwealth, including those dogs and cats returned to the store by customers, in a room meeting the requirements of 330 CMR 12.03(3) for a minimum period of 48 hours prior to Selling or Offering for Sale of the cat or dog received;
2. (2) Introduce no new dogs or cats into this room during the 48-hour isolation period; and
3. (3) Have each dog or cat checked by a Veterinarian after the 48-hour isolation period is complete and be certified healthy through issuance of a Health Certificate prior to Selling or Offering for Sale the cat or dog received.
4. (4) Any dog or cat showing signs of having an infectious or contagious disease shall be placed under Quarantine. Quarantined Animals shall remain in the Isolation Room or be held in a separate Quarantine Room within the same Facility until deemed healthy by a Veterinarian and shall be issued a valid Health Certificate prior to being removed from the Isolation Room or Quarantine Room unless other arrangements have been agreed to by the Department.
5. (5) No Animal presumed to be healthy shall be placed in an Isolation Room or Quarantine Room that is being used to hold sick or Quarantined Animals.
6. (6) The provisions of 330 CMR 12.07(1) and (3) shall not apply to dogs and cats sourced from organizations that hold a license from the Department under 330 CMR 30.00: Animal Rescue and Shelter Organization Regulations, and which are in compliance with 330 CMR 30.00.