(1)  An agreement may provide that the agreement or any specified provision of the agreement comes into operation on or after –

(a) the coming into operation of a specified amendment of an LPS; or

(b) the granting of a permit permitting use or development for a specified purpose; or

(c) the happening of a specified event; or

(d) a specified time; or

(e) the start or completion of a use or development or a specified part of a use or development.

(2)  An agreement may provide that the agreement ends on or after –

(a) the happening of any specified event; or

(b) a specified time; or

(c) the cessation of a use or development for a specified purpose.

(3)  An agreement may be ended by the planning authority with the approval of the Commission or by agreement between the authority and all persons who are bound by any covenant in the agreement.