The rate of basic pay is the rate fixed by law or administrative action for the position held by an employee, including annual premiums for standby duty; night differentials for prevailing rate employees; any special rates established under 5 U.S.C. Part III, Subpart D, Chapter 53, Subchapter 1, Sec. 5305 <a href="http://www.gpoaccess.gov/uscode/browse.html,">http://www.gpoaccess.gov/uscode/browse.html,</a> or other legal authority; and locality-based com