Pieces are eligible if not required to be mailed at First-Class rates or not eligible for Periodicals rates. Carrier route information updated using CASS-certified process within 90 days before mailing date. Mailings consisting of packages claimed at more than one Enhanced Carrier Route rate must bear appropriate marking for rate claimed. For additional marking standards for carrier route pieces, see M014 . See below for sack label Line 2 information.
Additional standards apply to mailings of nonidentical-weight pieces.
No special services are available for Standard Mail Enhanced Carrier Route flats and parcels. For Line 1, use 5-digit destination. For Line 1, use 5-digit destination. 2 Minimum 125 pieces per route. This guide is an overview only.