Conn. Gen. Stat. § 22-318a

Any herd owner, auctioneer, livestock dealer or sales manager, who contemplates a complete dispersal sale of a herd or a sale in which more than ten head is to be sold in a group shall furnish a list of animals to be sold to the commissioner not later than fourteen days prior to the sale. No owner, auctioneer, livestock dealer or sales manager shall conduct a dispersal sale without the approval of the commissioner. The State Veterinarian may require such herd to be tested for diseases, as the State Veterinarian determines are necessary, before such sale. If such herd has been tested or is tested in accordance with the provisions of this section and is found negative, permission shall be granted for said sale. Any test required pursuant to this section shall be performed at the owner's expense.