41 CFR § 105-68.435
What must I require of a primary tier participant?
June 9, 2020
You as an agency official must require each participant in a primary tier covered transaction to—
(a) Comply with subpart C of this part as a condition of participation in the transaction; and
(b) Communicate the requirement to comply with Subpart C of this part to persons at the next lower tier with whom the primary tier participant enters into covered transactions.