D.C. Mun. Regs. tit. 6, r. 6-B1144
A personnel authority may authorize a performance allowance for exceptional service for an employee in the Career, Legal, or Management Supervisory Service.
A performance allowance may be granted only once in any twelve-month (12-month) period and may not be granted if the employee has received a monetary award for performance pursuant to Chapter 19 of these regulations where that award was based on performance during any or all of the same period of time that would be covered by a performance allowance under this section.
A performance award may be granted only when the employee's performance rating assigned for the most recent rating period prior to the granting of an incentive is either "Substantially Exceeds Expectations" or better, "Exceeds Expectations" or better, or "Excellent" or better, as applicable.
A performance allowance shall not exceed ten percent (10%) of the maximum rate of pay for the employee's grade.
Upon being granted, a performance allowance shall be paid in equal installments over a period of twenty-six (26) consecutive pay periods, except that such award shall not be payable following a separation prior to the end of the period covered by the allowance payment.
A performance allowance awarded under this section shall not be considered basic pay for any purpose.
D.C. Mun. Regs. tit. 6, r. 6-B1144