Principal means, in the case of a Bid Bond, the Person bidding for the award of a Contract. In the case of Final Bonds and Ancillary Bonds, Principal means the Person primarily liable to complete the Contract, or to make Contract-related payments to other persons, and is the Person whose performance or payment is bonded by the Surety. A Principal may be a prime contractor or a subcontractor.
13 CFR § 115.10
Affiliate is defined in 121.301 of this chapter.