Which FAR section deals with the responsibilities of contractors using government sources?

The correct choice pertains to FAR Part 51, which is specifically focused on the use of government sources by contractors. This section outlines the rules and responsibilities that contractors must adhere to when they are utilizing government property or services. It provides guidance on how contractors can acquire government resources and the conditions under which they are expected to operate when doing so.

FAR Part 51 addresses the authority granted to contractors to utilize government facilities, supplies, and services, which is important for enhancing efficiency in the acquisition process. This part includes requirements for both contractors and government agencies to ensure that any transactions are performed in compliance with applicable laws and policies.

The other options, though related to the FAR as a whole, cover different areas. Part 52 deals with solicitation provisions and contract clauses, serving as a repository for standard clauses to be included in contracts. Part 53 focuses on forms and has guidelines regarding the various forms used in procurement. Lastly, Appendix sections typically provide additional information or guidance that may supplement the main parts but do not specifically outline contractor responsibilities concerning government sources.