14 CFR §1221.107

1. (a)Concurrently with the establishment of the NASA Flag in January 1960, the NASA Administrator also established NASA Flags to represent the NASA Administrator, Deputy Administrator, and Associate Administrator. Each of these flags conforms to the basic design of the NASA Flag except for the following:
   1. (1)The size of the flag is 3 feet x 4 feet;
   2. (2)The Administrator's Flag has four stars;
   3. (3)The Deputy Administrator's Flag has three stars; and
   4. (4)The Associate Administrator's Flag has two stars.
2. (b)Flags representing these senior officials shall be used as set forth in § 1221.113.