Conn. Gen. Stat. § 9-308: Canvass of returns.

Immediately on the close of the polls, the election officials shall proceed to canvass the returns as provided in section 9-309 and shall not stop for any purpose until the canvass is completed, except as provided in said section. The room in which such canvass is made shall be clearly lighted and such canvass shall be made in plain view of the public. No person or persons, during the canvass, shall close or cause to be closed the main entrance to the room in which such canvass is conducted, in such manner as to prevent ingress or egress thereby, but, during such canvass, no person other than the election officials shall be permitted to be in the area where the voting tabulator is located.