On April 3, 2009, the Office of Personnel Management (OPM), announced a new Federal law that entitles certain federal employees, absent from federal employment due to active military duty, to receive supplemental pay when their military pay and allowances are less than their civilian basic pay (basic pay includes base and locality).  The law specifically states that FAA shall, in consultation with OPM, develop procedures to ensure that the rights under this new section apply to FAA employees. It is effective on March I5, 2009.

Once this process has been finalized, employees will be paid the applicable amount retroactive to March 15,2009.

See Memo here