Other term. Any other term defined in the Federal explosives laws (18 U.S.C. chapter 40), the regulations promulgated thereunder (27 CFR part 555), or the Administrative Procedure Act (5 U.S.C. 551 et seq.), where used in this part, shall have the meaning assigned to it therein.
27 CFR § 771.5
When used in this part and in forms prescribed under this part, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms shall have the meaning provided in this subpart. Words in the plural form shall include the singular, and vice versa, and words importing the masculine gender shall include the feminine.