Except as otherwise provided in these regulations, the regulations governing leaves of absence for regular employees shall govern leaves of absence for duration employees. On the date duration appointments are terminated, the right of a person on leave from a duration appointment to be reinstated to his/her duration appointment shall terminate also. Upon such termination, an employee who had permanent or probationary status in a regular position immediately preceding his/her duration employment, shall be granted such leave of absence rights as he/she would still retain if the leave had been from the position previously held under permanent appointment.