The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Self-insurer-A common or contract carrier by motor vehicle which adjusts and is ultimately liable for payment of all or part of its bodily injury, property or cargo damage claims resulting from the operation, maintenance or use of a motor vehicle in certificated service.
52 Pa. Code § 32.1
The provisions of this §32.1 issued under the Public Utility Code, 66 Pa.C.S. § § 501, 512 and 1103(d).