While the Equipment Category for an equipment type is theoretically eligible to be updated, changes will not be allowed in the following cases:
Change will not be allowed if as a result of the requested update, all of the enabled equipment types for an A/P tariff service (where Tariff Attribute is "Carrier Specific Tariff" or "Customer Specific Carrier Tariff") where this equipment type is enabled would have an Equipment Category of "Tractor".
Change will not be allowed if the equipment type is referenced by an Equipment Association.
Change will not be allowed if as a result of the requested update, a "Tractor" specific master charge would have rates for a "Trailer" equipment type, or vice versa.
Change will not be allowed if as a result of the requested update, a "Tractor" specific charge would have equipment type cross references for "Trailer" equipment types, or vice versa.