is entitled to basic pay;

has the current technical qualification for duty in connection with supervision, operation, and maintenance of naval nuclear propulsion plants; and

executes a written agreement to remain on active duty in connection with supervision, operation, and maintenance of naval nuclear propulsion plants for a period of not less than three years, so long as the new period of obligated active service does not extend beyond the end of 30 years of commissioned service, in addition to any other period of obligated active service.

The total amount paid to an officer under an agreement under subsection (a) or (e)(1) may not exceed $30,000 for each year of the active-service agreement. Amounts paid under the agreement are in addition to all other compensation to which the officer is entitled.

The Secretary shall determine annually the necessity for continuance of the special pay and the rate of special pay per year for such active-service agreements accepted within each 12-month period.

Upon acceptance of an agreement under subsection (a) or (e)(1) by the Secretary, the total amount payable shall be paid in a single lump-sum or in annual installments of equal or different amounts over the length of the contract, commencing at the expiration of any existing period of obligated active service.

The Secretary may accept an active service agreement under this section not more than one year in advance of the end of an officer’s existing period of obligated active service under such an agreement. In such a case, the amount of the special pay may be paid commencing with the date of acceptance of the agreement, and, if the special pay will be paid in annual installments, the number of installments may not exceed the number of years covered by the agreement plus one.

An officer who is performing obligated service under an agreement under subsection (a) may, if the amount that may be paid under subsection (b) is higher than at the time the officer executed such agreement, execute a new agreement under this subsection. The period of such an agreement shall be a period equal to or exceeding the original period of the officer’s existing agreement, so long as the period of obligated active service under the new agreement does not extend beyond the maximum number of years of commissioned service authorized by subsection (a)(3). If a new agreement is executed under this subsection, the existing active-service agreement shall be cancelled, effective on the day before an anniversary date of that agreement after the date on which the amount that may be paid under this section is increased.

This subsection shall be carried out under regulations prescribed by the Secretary of the Navy.