The foregoing shall not be deemed to include persons engaged in the business of investigators for or adjusters for insurance companies, nor persons in the exclusive employment of common carriers subject to regulation by the interstate commerce commission or the Public Utility Commission of the Commonwealth of Pennsylvania, nor any telephone, telegraph or other telecommunications company subject to regulation by the Federal Communications Commission or the Public Utility Commission of the Commonwealth of Pennsylvania or an employe of any such company while performing any investigatory activities engaged in by his employer, or investigators in the employment of credit bureaus.
22 P.S. § 12