48 C.F.R. § 1902.101
As used throughout this regulation, the following words and terms are used as defined in this subpart unless (a) the context in which they are used clearly requires a different meaning or (b) a different definition is prescribed for a particular part or portion of a part.
Board means the Broadcasting Board of Governors, acting through any of its duty authorized officials.
Board Procurement Executive means the Director, Office of Contracts.
AR/CO means Authorized Representative of the Contracting Officer (see 1942.202-70).
Contracting activity means the Office of Contracts, which has the responsibility to contract for the acquisition of supplies and services (including construction).
Head of the Board (also called Board head ) means the Board Director or Deputy Director; and the term authorized representative means any person, persons or board (other than the contracting officer) authorized to act for the Head of the Board.
Purchasing Activity means an office with one or more Level I or Level II Small Purchases Contracting Officer(s) exercising limited redelegations of contracting officer authority.
BBG means the Broadcating Board of Governors.
48 C.F.R. § 1902.101