41 CFR § 105-68.365
What must I do if I learn of information required under §105-68.355 after entering into a covered transaction with a higher tier participant?
June 9, 2020
At any time after you enter into a lower tier covered transaction with a person at a higher tier, you must provide immediate written notice to that person if you learn either that—
(a) You failed to disclose information earlier, as required by §105-68.355; or
(b) Due to changed circumstances, you or any of the principals for the transaction now meet any of the criteria in §105-68.355.