48 C.F.R. § 15.204-5
The contracting officer shall prepare the representations and instructions as follows:
(b) Section L, Instructions, conditions, and notices to offerors or respondents. Insert in this section solicitation provisions and other information and instructions not required elsewhere to guide offerors or respondents in preparing proposals or responses to requests for information. Prospective offerors or respondents may be instructed to submit proposals or information in a specific format or severable parts to facilitate evaluation. The instructions may specify further organization of proposal or response parts, such as—
[62 FR 51230, Sept. 30, 1997, as amended at 75 FR 53142, Aug. 30, 2010]