Mode of delivery information is to be placed on the same line as delivery installation information. Mode of delivery information may consist of the following elements:
- Mode of Delivery Designator—The official CPC symbol for Postal Box (PO BOX), Rural Route (RR), Suburban Service (SS), Mobile Route (MR), or General Delivery (GD).
- Mode of Delivery Identifier—Numeric identifier separated from the mode of delivery designator by one space. Do not use the number sign (#) or the French abbreviation (nº) before the mode of delivery identifier (PO BOX 123, not PO BOX #123).