This direction was revised to include amendments to the existing rules, which came into force on September 13, 2013. Other changes include updated forms for the service contract and justification of a provision on retention incentives, as well as clarification of terminology and formatting corrections. An agency must set a single engagement rate for the employee, expressed as a percentage of the employee`s base salary, which must not exceed 25%. The OPM authorisation may increase this ceiling to 50 % on the basis of a critical need on the part of the administration. (See 5 CFR 575.309 (e)) The incentive may be paid in instalments after the end of certain periods of service during the entire period of service prescribed by the service contract or by a single lump sum after the conclusion of the entire duration of service required in the service contract. An agency shall not pay a retention incentive as the first lump sum payment at the beginning of a period of service or before the performance of the period of service for which the retention incentive is received. A instalment payment for the retention incentive may be calculated at the full percentage of the retention incentive or at a reduced rate, with the deductible deferred at the end of the full payment period. The organization is not required to pay an incentive if the employee has not successfully completed the probation period or training period before the start of the service period. Salaries normally paid outside the federal government Before paying a move incentive, an agency must establish a move incentive plan. .