The phrase "evaluating contract labor standards" can sound like the CO is auditing contractor payrolls. For a services CO running SCLS-covered contracts, that framing is misleading. DOL's Wage and Hour Division has primary enforcement authority. The CO's job is to get the setup right at solicitation, handle the option-year price adjustments, process conformance requests when they come up, and cooperate with DOL when a complaint or investigation arrives.

The agency's role steps up considerably on construction. FAR 22.406 gives the contracting agency compliance duties on Davis-Bacon work that do not exist for SCLS: reviewing weekly certified payrolls, conducting employee interviews, investigating apparent violations before they route to DOL. A CO who splits their time between services and construction will feel the difference.

The starting question on any contract is which labor standards law applies, and the answer comes from the principal purpose test, not from whether some labor shows up in the work.

Common exemptions worth knowing:

• Bona fide executive, administrative, and professional employees under 29 CFR Part 541 are exempt from both SCLS and DBA rate requirements.
• Certain maintenance, calibration, or repair of specific equipment may be exempt from SCLS under 41 U.S.C. 6703 when the narrow statutory tests are met.
• Supply contracts fall under the Walsh-Healey Public Contracts Act, not SCLS or DBA. A contract whose principal purpose is to furnish supplies is not an SCLS contract even if there is incidental labor in the delivery.
• Contracts for professional services (architects, engineers, attorneys, consultants) are typically outside SCLS because the workforce is exempt under Part 541.

Mixed-purpose contracts come up. A services contract that includes a small amount of construction, or a construction contract that includes follow-on maintenance, can trigger both sets of requirements for the respective portions. FAR 22.402(b) walks the treatment.

A wage determination (WD) is a DOL-issued document that sets the minimum hourly rate and fringe benefits the contractor must pay each category of worker on the contract. Reading one takes about five minutes once you know the structure.

SCLS wage determinations (the "Register of Wage Determinations Under The Service Contract Act") include:

• WD number and revision. Example: WD 2015-5395, Revision 24. The revision number changes as DOL updates the rates, usually annually.
• Geographic coverage. Counties, state, or specific installations.
• Effective date. When the revision takes effect for application purposes.
• Directory of occupations. SCA Directory codes and titles (Janitor 11150, Landscape Specialist 23580, Tractor Operator 23860, and so on).
• Minimum hourly rate by occupation.
• Health and Welfare (H&W) fringe rate. Usually a single hourly rate applied across most occupations.
• Vacation and holiday schedule.
• Executive Order minimum wage where applicable. Check the current status of any applicable EO floor, since this has changed with administration.

DBA wage determinations look different. They are organized by construction type (Building, Heavy, Highway, Residential), list craft rates (Carpenter, Electrician, Laborer, Roofer, etc.), and show fringe benefits as a separate hourly dollar amount rather than a single H&W rate. A DBA WD often references union agreements as the source of the rate and may include separate rates for apprentices and helpers.

Wage determinations live on sam.gov/wage-determinations. The workflow is short and the same basic shape for both SCLS and DBA:

1. Identify the type. SCLS for a services contract, DBA for a construction contract, picked from the principal purpose test.
2. Identify the performance location. County, state, or specific installation. Multi-location contracts need WDs for each location.
3. Pull the current WD. For SCLS, the Register of Wage Determinations for that county. For DBA, the construction type (Building, Heavy, etc.) that matches the work.
4. Attach the WD to the solicitation. Incorporated by reference with the number, revision, and effective date captured in the contract record.
5. File the WD baseline. Keep a copy in the contract file so that the option-year price adjustment calculation has a clean starting point.

For SCLS solicitations where the standard WD selector does not match the actual work (unusual location, non-standard occupation mix), DOL provides an e98 process. The CO submits an e98 request through DOL and receives a project-specific wage determination. This is uncommon on routine services contracts.

Effective date rules are specific and worth getting right. The WD in effect at the time of solicitation issuance is the one that typically attaches, with timing exceptions for solicitations held open past certain dates and for option exercises. FAR 22.1008 (SCLS) and FAR 22.404 (DBA) walk the timing in detail.

This is where most services COs spend the bulk of their labor standards time, and it is the section worth reading carefully.

FAR 52.222-43 (Fair Labor Standards Act and Service Contract Labor Standards, Price Adjustment, Multiple Year and Option Contracts) requires a contract price adjustment at each option exercise to reflect the cost impact of a revised wage determination. The clause is mandatory on most multi-year and option-year SCLS contracts. FAR 52.222-44 handles the comparable situation for certain multiple-year contracts without options.

The mechanics:

1. Pull the current WD before the option exercise. Grab the SCLS WD for the performance location from SAM.gov. If the revision is newer than the one currently incorporated in the contract, the clause is triggered.
2. Notify the contractor and incorporate the revised WD. By bilateral or unilateral modification, depending on how the office prefers to handle it. The contract now references the new revision.
3. The contractor has 30 days to submit actual cost impact. The clause limits recovery to the actual labor cost delta: new hourly rate minus old hourly rate, applied to actual hours in each affected category. H&W delta works the same way.
4. The CO reviews the submission. Mathematical accuracy, consistency with the labor categories actually used on the contract, no claimed hours for categories that are not performing, no G&A or profit applied on top of the wage delta.
5. Modify and document. Bilateral modification adjusts the option-year ceiling price. File the modification, the contractor's submission, and the new WD in the contract file.

The adjustment should be in place before the option period begins. A CO who discovers at month six of an option that the revised WD was never incorporated has a messier situation. The clause still requires the adjustment, but the contractor has already been performing at the new rates and the reconciliation is harder than a clean 30-day submission would have been.

When the contract requires a labor category that is not on the attached SCLS wage determination, the contractor cannot simply pick a rate. FAR 52.222-41(c) and DOL's conformance process at 29 CFR 4.6(b)(2) require the contractor to submit a conformance request using SF 1444 ("Request For Authorization of Additional Classification and Rate").

The process in practical terms:

1. Contractor identifies the gap. A labor category not listed on the WD is needed for the work.
2. Contractor proposes a rate and fringe that bear a reasonable relationship to other listed categories on the same WD.
3. Contractor submits SF 1444 through the CO.
4. CO reviews. Does the proposed rate sit in a sensible place relative to similar categories already on the WD? Is the classification well-defined? The CO then forwards the request to DOL's Wage and Hour Division.
5. DOL reviews and responds. Approve, modify, or deny. Typical turnaround is weeks to months.
6. Approved rate is retroactive to the first day the unlisted work was performed.

A practical observation: many contracting offices do not actively process conformance requests. The paperwork burden is real, DOL's turnaround is slow, and the volume a single CO might see in a year is low. Offices with a dedicated labor advisor or an office lead who handles conformances usually have the CO flag the need and route to that person. Offices without that support handle it directly when they have to, or (more often) the gap gets managed through a better-scoped next solicitation.

Davis-Bacon contracts give the contracting agency compliance duties that SCLS contracts do not. A CO picking up a construction contract needs to know what steps up.

Weekly certified payrolls. FAR 22.406-6 requires the contractor to submit a weekly certified payroll (Form WH-347 or equivalent) covering every employee performing work on the site of the work. Each payroll is certified by the contractor as accurate and compliant with the wage determination. The contracting agency reviews these as they come in, not just at the end of the contract.

What the payroll review is actually looking for:

• Every employee has a classification that matches one on the WD, or has a conformance in place.
• The hourly rate paid meets or exceeds the WD rate for that classification.
• Fringe benefits are being paid, either in cash or into a bona fide plan, at the rate on the WD.
• Overtime premiums are calculated correctly on the basic rate.
• Apprentices are registered with a bona fide DOL-recognized apprenticeship program, and the apprentice-to-journeyman ratio on the job is within the program's allowed ratio. A worker paid at apprentice rates without proper registration must be paid the journey rate as the remedy under FAR 22.406-4.
• The hours reported are consistent with what is being observed on the job site, to the extent the CO or a representative conducts site visits.

Employee interviews. FAR 22.406-6(b) authorizes on-site interviews with contractor employees using SF 1445 ("Labor Standards Interview"). These are short conversations, not depositions. The interviewer confirms the employee's name, classification, rate, and hours against the payroll submission. Discrepancies between the interview and the payroll are a significant finding.

Site postings. The contractor must post WH-1321 ("Notice to Employees Working on Federal or Federally Financed Construction Projects") and the applicable wage determination at the site of the work in a location accessible to the employees.

Investigations of apparent violations. When payroll review or interviews surface an apparent violation, FAR 22.406-8 walks the agency's investigation process. The agency has the first look. Matters not resolved at the agency level route to DOL.

Both SCLS and DBA complaints route to DOL's Wage and Hour Division for investigation. A CO managing a contract under DOL investigation has a specific role and a specific set of things to stay out of.

What typically happens:

• A complaint originates from an employee, a union, or (less often) an anonymous tip.
• WHD opens an investigation and may request contract documents, wage determinations, payrolls, and contact with the CO.
• The CO's role is to cooperate, provide requested documentation, and let DOL lead the investigation. The CO does not separately adjudicate the labor claim.
• The contract continues. An open DOL investigation by itself is not a basis to stop work, withhold payment, or terminate the contract. Withholding of contract funds for back wages is a DOL-initiated action with specific procedures under 29 CFR Part 5 (DBA) or 29 CFR Part 4 (SCLS).
• Outcomes can include back wage computations, civil money penalties, and in serious or repeated cases, debarment from future federal contracts under 41 U.S.C. 6706 (SCLS) or 29 CFR 5.12 (DBA).

The CO stays in coordination with DOL throughout but does not run a parallel investigation. If DOL computes back wages, the CO's role is to process the withholding or payment adjustment DOL directs, on the timeline DOL directs.

The CO's labor standards touchpoints across a contract's life, split by lane: