Conn. Gen. Stat. § 31-13b: Visible clock required as part of time card system.

On and after January 1, 1977, no employer, private, municipal or state, shall use a time card system, recording clock or other device intended to record the work time of an employee unless such system, clock or device has incorporated within it a clock which is synchronized with such system, clock or device and which is displayed so as to be easily visible.