52 Pa. Code § 1025.1
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Form E-The standard form filed by a regulated party's insurer evidencing the existence of a current and valid insurance policy or surety bond in the name of the insured and for lines of coverage and with limits required by the Authority.
Form K-The standard form filed by a regulated party's insurer providing notice of cancellation of an insurance policy or surety bond previously maintained to be in compliance with the act, this part or an order of the Authority.
Self-insurer-A certificate holder that 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 as a taxicab.
52 Pa. Code § 1025.1