12 C.F.R. § 22.10

(a) Notice requirement. When a national bank or Federal savings association makes, increases, extends, renews, sells, or transfers a loan secured by a building or mobile home located or to be located in a special flood hazard area, it shall notify the Administrator of FEMA (or the Administrator's designee) in writing of the identity of the servicer of the loan. The Administrator of FEMA has designated the insurance provider to receive the national bank's or Federal savings association's notice of the servicer's identity. This notice may be provided electronically if electronic transmission is satisfactory to the Administrator of FEMA's designee.

(b) Transfer of servicing rights. The national bank or Federal savings association shall notify the Administrator of FEMA (or the Administrator's designee) of any change in the servicer of a loan described in paragraph (a) of this section within 60 days after the effective date of the change. This notice may be provided electronically if electronic transmission is satisfactory to the Administrator of FEMA's designee. Upon any change in the servicing of a loan described in paragraph (a) of this section, the duty to provide notice under this paragraph (b) shall transfer to the transferee servicer.