Amount. The Secretaries concerned may, upon acceptance of the written
agreement, pay an eligible individual incentive pay in an annual amount not to exceed:
A. $5,000 a year for a 1- year contract.
B. $10,00 0 a year for a 2- year contract.
C. $15,000 a year for a 3 - year contract.
D. $20,000 a year for a 4 - year contract.