The period specified in an agreement under section 127 above as the period for which it is made shall not be less than five years.
An agreement under section 127 above shall remain in force until the occurrence of whichever of the following events first occurs, that is to say—
At any time while an agreement under section 127 above is in force, the applicant may apply to the appropriate agency to terminate the agreement.
If, on an application for the termination of an agreement under section 127 above, the appropriate agency is satisfied that, by reason of any change of circumstances since the agreement was made, it ought to be terminated, it may terminate the agreement, either unconditionally or subject to such conditions (whether as to any payment to be made by the applicant or otherwise) as the appropriate agency and the applicant may agree.