Conn. Gen. Stat. § 5-209: Compensation for performance of duties of higher job classification.

Any state employee, except an employee who has been designated managerial, who is assigned, by the employee's appointing authority, duties and responsibilities of a job classification higher than the class in which the employee is placed, which assignment has been approved by the Commissioner of Administrative Services, and who works in such assignment on a continuous basis for a period of more than sixty working days, shall be compensated for such time in excess of sixty days at a rate in the higher class which shall not be less than one step in that class above the employee's existing rate of pay. Service in a higher classification under this section shall not constitute permanent status in such class.