Section 303.21 - Filing procedures(a) Applications for deposit insurance shall be filed with the appropriate FDIC office. The relevant application forms and instructions for applying for deposit insurance for an existing or proposed depository institution may be obtained from any FDIC regional director.(b) An application for deposit insurance for an interim depository institution shall be filed and processed in accordance with the procedures set forth in § 303.24 , subject to the provisions of § 303.62(b)(2) regarding deposit insurance for interim institutions. An interim institution is defined as a state- or federally-chartered depository institution that does not operate independently but exists solely as a vehicle to accomplish a merger transaction.(c) A request for continuation of deposit insurance upon withdrawing from membership in the Federal Reserve System shall be in letter form and shall provide the information prescribed in § 303.25 .