Shellfish growing in uncertified areas may not be brought into a bed for which a certificate has been issued unless special approval is first granted by the State Department of Public Health. Such approval shall be in writing and granted only on condition that the method of transplanting and timing of arrival of the shellfish will insure that the transplanted shellfish remain in the approved growing area at least 30 days before harvesting for sale for human consumption. This translating area must be in separate portions of the bed and one in which no other shellfish are held.