; and (ii) to the fullest extent possible, and consistent with the safe and sound operation of insurance savings and loan holding companies, does not unnecessarily duplicate the supervision of insurance underwriting companies by the State insurance authorities for insurance savings and loan holding companies or insurance underwriting companies that are subsidiaries of insurance savings and loan holding companies. (B) Review of supervisory guidance Following public notice and comment, the Board shall review and revise supervisory policy letters and guidance applicable to insurance savings and loan holding companies to ensure that those letters and guidance are not inconsistent with the supervisory framework required under this paragraph. . 3. Assessments and fees for insurance savings and loan holding companies The second subsection (s) of section 11 of the Federal Reserve Act ( 12 U.S.C. 248