5 CFR § 919.365
What must I do if I learn of information required under §919.355 after entering into a covered transaction with a higher tier participant?
November 4, 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 §919.355; or
(b) Due to changed circumstances, you or any of the principals for the transaction now meet any of the criteria in §919.355.