Alaska Stat. § 38.35.220
(a) Natural gas carriers that operate as public utilities holding easements, rights-of-way, or permits for pipelines on state public land on May 20, 1972, are unaffected by this chapter within the scope of their existing operations, normal expansions, and extensions thereof so long as their original or present purpose and function remains unchanged. This exemption does not apply to a natural gas pipeline constructed outside of the