N.Y.C. Charter § 870: Section 870. Office of payroll administration.

There shall be an office of payroll administration which shall be headed by two directors appointed by the mayor, one of whom shall be appointed upon the recommendation of the comptroller. The directors may be city employees. They shall receive no compensation for their services to the office (except that a city employee may continue to receive regular compensation) but shall be compensated for expenses actually and necessarily incurred in the performance of their duties.