Rule of Two
The rule of two directs a contracting officer to set aside an acquisition for small business when there is a reasonable expectation of receiving offers from at least two responsible small business concerns and making award at fair market prices, per FAR 19.502-2.
FAR 19.502-2 states it twice. Between the micro-purchase threshold and the simplified acquisition threshold, acquisitions are set aside automatically unless the contracting officer finds no reasonable expectation of competitive offers from two responsible small businesses. Above the SAT, the officer shall set the acquisition aside when the two-offer expectation exists and award is expected at fair market prices.
The expectation is built on market research, not headcounts. Sources-sought responses, recent competition history, and DSBS results carry the finding; two firms that are merely capable do not equal two firms reasonably expected to offer. At VA the rule hardens: 38 U.S.C. 8127(d) makes restricted competition for veteran-owned firms mandatory, and the Supreme Court held unanimously in Kingdomware (2016) that the duty reaches Federal Supply Schedule orders.
Orders under multiple-award contracts are the contested edge. January 2025 proposed rules that would have pushed the rule of two into task and delivery orders were withdrawn on June 12, 2025, so at the order level the set-aside decision remains discretionary under the published FAR.
Regulatory Reference
FAR 19.502-2; 38 U.S.C. 8127(d); Kingdomware Techs. v. United States (2016)
RFO Status
The Part 19 model deviation rewrites the rule at 19.104-1 with a single test above the micro-purchase threshold, adding quality and delivery to the price factors, and moves order-level set-asides to 19.111-2; Part 19 is not in the June 2026 first-batch proposed rules, so FAR 19.502-2 still controls absent an agency deviation.
Category
Regulations & Policy
How AcqBot Helps
AcqBot assembles the rule-of-two record for each acquisition — sources-sought responses, DSBS matches, prior competition history — and drafts the set-aside or withdrawal determination on the market research the finding rests on.
Related glossary entries
Class Deviation
A class deviation authorizes an agency to depart from specific FAR or supplement provisions for a category of contract actions rather than a single case — the mechanism agencies are using to implement the Revolutionary FAR Overhaul ahead of formal rulemaking.
Commercial Products and Services (FAR Part 12)
Commercial products and commercial services are items of a type sold, leased, licensed, or offered in the commercial marketplace, defined at FAR 2.101. FAR Part 12 implements the statutory preference for buying them whenever market research shows they can meet the agency's need.
Controlled Unclassified Information (CUI)
Controlled Unclassified Information (CUI) is information the government creates or possesses, or that an entity handles on its behalf, that a law, regulation, or governmentwide policy requires safeguarding or dissemination controls for — sensitive but not classified, governed by 32 CFR Part 2002.
NIST SP 800-171
NIST Special Publication 800-171 lists the security requirements for protecting CUI on nonfederal information systems. DFARS 252.204-7012 makes it contractual for defense work — held at Revision 2 by class deviation — and its 110 requirements are the CMMC Level 2 baseline.