The Agency should develop its own directive on the use of the Continuing Service Agreement (APF). In situations where a staff member must sign a CSA, they must do so in writing before being assigned to training. 5 U.S.C. § 4108(a)(1). If the worker leaves the government before the agreed amount of service, the Agency has the right to demand reimbursement for the time not provided. Id. in points (b) and (c). For your reference:. .