Neither this chapter nor anything contained herein is or shall be construed as a restriction or limitation upon any powers that the Authority might otherwise have under any laws of the Commonwealth, and this chapter is cumulative to any such powers, provided, however, that nothing in the foregoing provision shall be deemed to have expanded the powers of the Authority to provide and operate telecommunication and related services, including without limitation, cable television, internet, and all other services that might be rendered by use of the Authority’s fiber optic system, beyond existing restrictions and limitations thereon. This chapter does and shall be construed to provide a complete, additional, and alternative method for the doing of the things authorized hereby and shall be regarded as supplemental and additional to powers conferred by other laws.