In plain English
FAR 52.222-25, Affirmative Action Compliance, is a solicitation provision prescribed at FAR 22.810(d), most recently dated Apr 1984. The complete official text is reproduced below, verbatim, from GSA's published FAR source files.
Its text contains no sentence requiring insertion into subcontracts; see the flowdown section below for what that does and does not mean.
Does it flow down to subcontracts?
No flowdown mandate found in the clause text
This is a solicitation provision — it applies to offerors when submitting an offer, not to contract performance, so subcontract flowdown is generally not the operative question for it.
Where it's prescribed
As prescribed in 22.810(d), insert the following provision:
Prescribing reference: FAR 22.810(d).
The official text, verbatim
As prescribed in 22.810(d), insert the following provision:
Affirmative Action Compliance (Apr 1984)
The offeror represents that-
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(a) It □ has developed and has on file, □ has not developed and does not have on file, at each establishment, affirmative action programs required by the rules and regulations of the Secretary of Labor (41 CFR 60-1 and 60-2); or
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(b) It □ has not previously had contracts subject to the written affirmative action programs requirement of the rules and regulations of the Secretary of Labor.
(End of provision)