In plain English
FAR 52.214-16, Minimum Bid Acceptance Period, is a solicitation provision prescribed at FAR 14.201-6(j), 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 14.201-6(j), insert the following provision in invitations for bids, except for construction, if the contracting officer determines that a minimum acceptance period must be specified:
Prescribing reference: FAR 14.201-6(j).
The official text, verbatim
As prescribed in 14.201-6(j), insert the following provision in invitations for bids, except for construction, if the contracting officer determines that a minimum acceptance period must be specified:
Minimum Bid Acceptance Period (Apr 1984)
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(a) "Acceptance period," as used in this provision, means the number of calendar days available to the Government for awarding a contract from the date specified in this solicitation for receipt of bids.
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(b) This provision supersedes any language pertaining to the acceptance period that may appear elsewhere in this solicitation.
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(c) The Government requires a minimum acceptance period of __________ calendar days [the Contracting Officer shall insert the number of days].
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(d) In the space provided immediately below, bidders may specify a longer acceptance period than the Government’s minimum requirement.
The bidder allows the following acceptance period: __________ calendar days.
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(e) A bid allowing less than the Government’s minimum acceptance period will be rejected.
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(f) The bidder agrees to execute all that it has undertaken to do, in compliance with its bid, if that bid is accepted in writing within-
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(1) The acceptance period stated in paragraph (c) of this clause; or
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(2) Any longer acceptance period stated in paragraph (d) of this clause.
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(End of provision)