Conn. Gen. Stat. § 10-195: Evidence of age.

Upon the trial of any person who has wilfully employed or has had in his or her employment or under his or her charge any child in violation of the provisions of this chapter and of any parent or guardian who has permitted any such child to be so employed, a certificate of the age of such child, made as provided in section 10-193, shall be conclusive evidence of his or her age.