12 C.F.R. § 745.0
The regulation contained in this part describe the insurance coverage of various types of member accounts. In general, all types of member share accounts received by the credit union in its usual course of business, including regular shares, share certificates, and share draft accounts, represent equity and are insured. For the purposes of applying the rules in this part, it is presumed that the owner of funds in an account is an insured credit union member or otherwise eligible to maintain an insured account in a credit union. These rules do not extend insurance coverage to persons not entitled to maintain an insured account or to account relationships that have not been approved by the Board as an insured account. Where there are multiple owners of a single account, generally only that part which is allocable to the member(s) is insured.
12 C.F.R. §745.0