Origin NDC Sacks: Required, no minimum. Labels: For Line 1, use L601, Column B. For Line 2, use “STD MACH NDC.” Price: Mixed NDC. | Mixed NDC Sacks: Required, no minimum for all remaining mail. Labels: For Line 1, “MXD” followed by L601, Column B information for NDC serving the 3-digit ZIP Code prefix of the entry post office. For Line 2, use “STD MACH WKG.” Price: Mixed NDC. | |