(a) Review each master agreement at least annually before the anniversary of its effective date and revise it as necessary to conform to the requirements of the FAR and DFARS. Statutory or other mandatory changes may require review and revision earlier than one year.

(b) A master agreement shall be changed only by modifying the master agreement itself. It shall not be changed through a job order.

(c) A modification to a master agreement shall not affect job orders issued before the effective date of the modification.