; and (B) does not include additional pay, such as night shift differentials under section 5343(f) of title 5, United States Code, or environmental differentials under section 5343(c)(4) of such title. (4) Special rate of pay The term special rate of pay means a higher than normal rate of pay that exceeds the otherwise applicable rate of basic pay for a similar covered CBP employee at a land port of entry. (b) Hiring incentives (1) In general To the extent necessary for U.S. Customs and Border Protection to hire, train, and deploy qualified officers and employees, and to the extent necessary to meet the requirements set forth in section 1141, the Commissioner, with the approval of the Secretary, may pay a hiring bonus of $10,000 to a covered CBP employee, after the covered CBP completes initial basic training and executes a written agreement required under paragraph (2). (2) Written agreement The payment of a hiring bonus to a covered CBP employee under paragraph (1) is contingent upon the covered CBP employee entering into a written agreement with U.S. Customs and Border Protection to complete more than 2 years of employment with U.S. Customs and Border Protection beginning on the date on which the agreement is signed. Such agreement shall include— (A) the amount of the hiring bonus; (B) the conditions under which the agreement may be terminated before the required period of service is completed and the effect of such termination; (C) the length of the required service period