You can change optional fields to required fields and more closely match your requirements to the UPS WorldShip entry requirements. Only one required field set can be defined for each profile; however, you can change the required field set for a particular profile at any time.
The Required Field Set box in the Profile Editor window allows you to choose the UPS required field set, which includes all fields that UPS requires for shipping. If this predefined required field set does not closely match your entry requirements, you can create a custom required field set using the Required Field Set Editor. Once you create a required field set, its name appears in the Required Field Set box in the Profile Editor window along with the UPS required field set.