39 CFR §242.2

Report by memorandum to chief, organization and management branch, when change in site is necessary. Complete Form 1021 when furnished. Retain one copy in files. If new location is one-fourth of a mile or more from existing location, furnish a statement signed by majority of customers approving change. When a change involves moving a post office from one county to another, notify the Deputy Postmaster General, of the circumstances (including a sketch showing present and proposed sites), and await approval of that Division.