Conn. Gen. Stat. § 22-339c: Certificate of rabies vaccination.

(a) A certificate of rabies vaccination shall be (1) a form approved by the National Association of Public Health Veterinarians, (2) any form approved by the State Veterinarian, or (3) any form that has the following information regarding the vaccinated animal: (A) The name and address of its owner; (B) a description of the animal which specifies its species, breed, age, color or markings and sex; (C) the date of the vaccination, the duration of the immunity provided by the vaccination, the producer of the vaccine and the vaccine serial number; (D) the rabies tag number; and (E) the signature and license number of the veterinarian administering the vaccination. Such certificate shall be the official proof of rabies vaccination submitted to a town clerk in accordance with the provisions of section 22-338 or 22-339a.

(b) The owner or keeper of a dog or cat shall keep a certificate, or copy thereof, stating that such dog or cat has been vaccinated against rabies and shall make such certificate or copy available to any animal control officer, regional animal control officer or municipal animal control officer of any municipality for inspection.

(c) An antirabies clinic, upon request of any municipal animal control officer or animal control officer, shall submit to such officer a copy of any such certificate issued. Such copy shall be used by the officer to search for unlicensed dogs in accordance with the provisions of section 22-349.