What Is the Rule of Three in Federal Civil Service Hiring?

The Rule of Three in federal hiring was a longstanding civil service requirement that limited a hiring manager’s selection to the top three ranked candidates on a certificate of eligibles. Congress repealed it in Section 1107 of the National Defense Authorization Act for Fiscal Year 2019, and the replacement framework, informally called the Rule of Many, took full effect on March 9, 2026.¹ Federal job seekers and hiring managers now work within a broader referral system, though merit-based competition and veterans’ preference still govern the process.

How the Old Rule Worked

For most of the modern civil service era, when a federal agency needed to fill a competitive service position, human resources scored and ranked every qualified applicant, then sent the hiring manager a certificate listing only the top three available names. The manager had to pick from that short list. If none of the three seemed right, the manager could decline to hire anyone, but could not reach past third place to a candidate in fourth or fifth position.

The logic was to keep hiring focused on merit and make it harder for a manager to cherry-pick a favored candidate buried deep on the register. In practice, the restriction created real problems. Managers often felt boxed in. When the top three all had strong test scores but lacked the specific experience the job actually required, the manager’s only option was to cancel the announcement and start over.¹

Why Congress Eliminated It

Section 1107 of Public Law 115-232 rewrote the certification rules at 5 U.S.C. § 3317.² The old text required exactly three names. The new text requires a “sufficient number” of names from the top of the register, with a floor of no fewer than three. Critics of the old system had pointed out that numerical scores often grouped candidates so tightly that the difference between third and eighth place was negligible, and cutting the manager off at three felt arbitrary in that setting. The rewrite gave OPM authority to prescribe how agencies would decide how many names to certify.

What Replaced It: The Rule of Many

OPM published its final implementing rule on September 8, 2025, and agencies were required to comply by March 9, 2026.¹ Under the Rule of Many, an agency has to decide before it announces a vacancy how it will size the referral pool. OPM’s regulations allow four methods:

An assessment-based cut-off score, established by testing experts and supported by job analysis data, to identify the most qualified applicants.
A business-necessity cut-off score, set to keep the pool manageable when the agency lacks resources for labor-intensive assessments like structured interviews.
A set number of highest-ranked candidates, such as the top ten.
A set percentage of highest-ranked candidates, such as the top 20 percent.

The agency locks in its method before the job goes live, which prevents a manager from resizing the pool after seeing who applied. The hiring manager then selects from the certified list. The rules cover both competitive service and excepted service positions.

What Did Not Change

Veterans’ preference and pass-over protections survived the switch. A willful violation of any veterans’ preference requirement remains a prohibited personnel practice under federal law.³ Preference-eligible veterans still receive five or ten points added to their examination scores, and disabled veterans with a compensable service-connected disability of 10 percent or more still receive priority placement on registers of eligibles.⁴

A hiring manager who wants to select a non-veteran over a preference-eligible veteran on the same certificate still has to file an objection with OPM (or with the agency head, if the agency has delegated examining authority) and provide adequate justification for the pass-over.⁵ The protection is even stronger for veterans with a compensable disability of 30 percent or more, who must be notified and given 15 days to respond before OPM completes its review. Medical disqualification is one common basis for pass-over, and OPM retains exclusive authority to approve medical pass-overs for preference-eligible veterans.

A Separate Rule People Confuse With the Rule of Three

The “three considerations” rule at 5 U.S.C. § 3318(e) is a different provision that often gets tangled up with the old Rule of Three. It addresses what happens to a candidate who keeps landing on certificates but never gets picked. Once a candidate has received genuine consideration for three separate appointments to the same position (same title, series, and grade) and a different candidate was validly selected each time, the agency is no longer required to keep certifying that person for that role.⁵

Removal is not automatic. The manager has to actually review the application each time, then sign a written statement identifying the specific skills the candidate lacked. The servicing HR director must concur, and the case file must document all three valid selections along with that concurrence.⁶ If the candidate asks, the agency must provide written notice explaining the removal. The three-considerations rule does not apply to shared certificates.

When Ranking Rules Do Not Apply at All

Some federal vacancies skip competitive ranking entirely. When OPM determines that a severe shortage of candidates or a critical hiring need exists, it can grant direct hire authority, which lets agencies hire any qualified applicant without competitive rating, ranking, veterans’ preference procedures, or the Rule of Many mechanics.⁷ The agency’s Chief Human Capital Officer requests the authority, and OPM sets the duration.⁸

As of 2026, governmentwide direct hire authorities cover several high-demand fields:

Medical occupations, including nurses, physicians, pharmacists, and diagnostic radiologic technologists at all grade levels.
IT management positions focused on information security at GS-9 and above.
STEM roles such as engineers, biological scientists, economists, data scientists, and actuaries at GS-11 through GS-15, authorized through December 31, 2028.
Cybersecurity roles including computer engineers, computer scientists, electronics engineers, and criminal investigators at GS-12 through GS-15, authorized through December 31, 2028.
Artificial intelligence roles for IT specialists, computer scientists, and computer engineers at GS-9 through GS-15, authorized through December 31, 2028.

If a job posting says it uses direct hire authority, veterans’ preference points and competitive ranking do not apply to that specific vacancy.⁷

Challenging a Selection

Applicants who believe a selection violated merit principles or veterans’ preference have two main routes. Preference-eligible applicants can file a Veterans Employment Opportunities Act complaint with the Department of Labor’s Veterans’ Employment and Training Service within 60 days of the alleged violation.⁹ If the Labor Department cannot resolve it, the veteran can appeal to the Merit Systems Protection Board within 15 days of the notice that its efforts were unsuccessful.

For broader prohibited personnel practices such as discrimination, nepotism, or granting unauthorized preferences, any applicant or employee can file a complaint with the Office of Special Counsel, which investigates and can seek corrective action before the MSPB.¹⁰ The MSPB generally cannot take standalone jurisdiction over a hiring violation unless it connects to a recognized appeal right, though it can consider prohibited personnel practice claims raised as a defense in an otherwise appealable action.

1
Federal Register. Reinvigorating Merit-Based Hiring Through Candidate Ranking in the Competitive and Excepted Service
2
Office of the Law Revision Counsel. 5 USC 3317 – Competitive Service; Certification Using Numerical Ratings
3
Office of the Law Revision Counsel. 5 USC 2302 – Prohibited Personnel Practices
4
Office of the Law Revision Counsel. 5 USC 3309 – Preference Eligibles; Examinations; Additional Points For
5
Office of the Law Revision Counsel. 5 USC 3318 – Competitive Service; Selections Using Numerical Ratings
6
eCFR. 5 CFR 332.405 – Three Considerations for Appointment
7
U.S. Office of Personnel Management. Direct Hire Authority
8
eCFR. 5 CFR 337.201 – Coverage and Purpose
9
eCFR. 5 CFR Part 1208 Subpart C – VEOA Appeals
10
U.S. Merit Systems Protection Board. Prohibited Personnel Practice 6 – Granting Any Preference or Advantage Not Authorized by Law