For purposes of a transaction request affecting payment instructions with respect to a security, a proper request must be received not less than ten (10) business days preceding the next payment date. If a transaction request is received less than ten (10) business days preceding a payment date, the Department may in its discretion act on such request if sufficient time remains for processing. If a transaction request is received too late for completion of the requested transaction, the transaction request will be acted upon with respect to future payments only.
31 C.F.R. §357.29
Approved by the Office of Management and Budget under control number 1535-0068