70 Pa. Code § 9.2
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Gross weight-Total weight of vehicle and load.
Net weight-Gross weight less tare weight.
Public weighing-The weighing of a commodity for a commercial purpose.
Tare weight-The actual weight of only the vehicle.
Weighmaster's certificate-A document in the format in § 9.11 (relating to issuing a public weighmaster's certificate), evidencing that the issuer is licensed by the Department in accordance with section 4151 of the act (relating to licenses), has weighed the material described in that document on an approved scale which has been tested for accuracy, and has complied with relevant provisions of this chapter.
70 Pa. Code § 9.2