Rules And Special Service Charges (ABF 111-AF
Item 171 : Application of Classes - Artificial Construction of Density to Obtain a Lower Class (Bumping)
"Bumping" is the declaration on the original bill of lading of an artificially higher weight for the purpose of causing a higher density that allows the article or piece being "bumped" to qualify for a lower classification rating.
"Bumping" may be performed under the provisions in Item 171, NMF 100 Series (NMFC) subject to the following:
"Bumping" provisions may only be used for commodity items in the NMFC that assign classes based upon density and then only for those that make specific reference to Item 171 in the NMFC.
Shipper may only "Bump" to the next lower (NMFC) class or rating. "Bumping" to an exception or freight all kinds class or rating is not permitted.
When the provisions of this rule are utilized, shipper must declare intent to "bump" at time of shipment and include the following items on the original bill of lading: actual cube, actual weight, density group (sub) embracing the actual density, declared density and declared weight for billing.