Mandatory requirement to use "___________" in block 21 for active duty (including FTS) members under NAVPERSCOM, Augmentation Management Division (PERS-4G) orders who have been at their parent command for less than 240 days or for periods of performance less than 240 days. If the member was at the parent command for greater than or equal to 240 days of the reporting period, this billet subcategory cannot be used.
a) "SEA"
b) "ASH"
c) "NA"
d) "TBD"