12 CFR 1263.30: Readmission to membership.

(a) In general. An institution that has withdrawn from membership or otherwise has had its membership terminated and which has divested all of its shares of Bank stock, may not be readmitted to membership in any Bank, or acquire any capital stock of any Bank, for a period of five years from the date on which its membership terminated and it divested all of its shares of Bank stock.

(b) Exceptions. An institution that transfers membership between two Banks without interruption shall not be deemed to have withdrawn from Bank membership or had its membership terminated.