In plain English
FAR 52.242-13, Bankruptcy, is a contract clause prescribed at FAR 42.903, most recently dated July 1995. 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
We scanned the full clause text and found no sentence directing the contractor to insert this clause into subcontracts. That is a statement about the text, not legal advice: a prime contractor may still flow terms down contractually, an agency supplement (DFARS, VAAR, …) may add requirements, and clauses listed below (if any) may order this clause into subcontracts from the outside.
Where it's prescribed
As prescribed in 42.903 , insert the following clause:
Prescribing reference: FAR 42.903.
The official text, verbatim
As prescribed in 42.903 , insert the following clause:
Bankruptcy (July 1995)
In the event the contractor enters into proceedings relating to bankruptcy, whether voluntary or involuntary, the contractor agrees to furnish, by certified mail or electronic commerce method authorized by the contract, written notification of the bankruptcy to the contracting officer responsible for administering the contract. This notification shall be furnished within fivedays of the initiation of the proceedings relating to bankruptcy filing. This notification shall include the date on which the bankruptcy petition was filed, the identity of the court in which the bankruptcy petition was filed, and a listing of government contract numbers and contracting offices for all government contracts against which final payment has not been made. This obligation remains in effect until final payment under this contract.
(End of clause)