24 C.F.R. § 232.570
The Commissioner shall indicate his insurance of the loan by endorsing the credit instrument and identifying the section of the Act and regulations under which the loan is insured and the date of insurance, subject to the presentation and approval by him of the following:
[39 FR 28966, Aug. 12, 1974, as amended at 80 FR 48028, Aug. 11, 2015]