Whenever an employee of the Department has been subpoenaed as a witness in connection with a matter arising out of the course of his employment with the department and is required to respond to such subpoena on a scheduled day off, said employee shall be guaranteed one (1) hour for reporting, and after one (1) hour he shall be paid to the next highest tenth (1/10th) per hour that he was required to be in attendance at the hearing at the overtime rate.