(1) An agency may extend the length of a probationary period for a maximum of 6 additional and consecutive calendar months.

(2) When the probationary period is extended, the agency must notify the employee in writing on or before the end of the established probationary period that the probationary period has been extended and the agency must inform the employee of the length of the extension.

(3) An employee whose probationary period has been extended does not attain permanent status until the employee successfully completes the additional probationary period.