(a) Except as provided in (c) of this section, nothing in this chapter prevents the inclusion in a lease or other agreement relating to a project of a provision granting the right to purchase the project, or to renew or extend the lease or agreement, upon the terms and conditions that may be provided for in the lease or agreement.
(b) A lease with respect to a project may provide for two or more lessees with the legal relationship between themselves and the authority which the authority may approve, including without limitation, provisions to the effect that the obligations of the lessees under the lease for payment of rental or otherwise between themselves and the authority are several, joint, or joint and several and that the lessees lease the project as tenants in common, or otherwise.
(c) The authority, without first obtaining legislative approval, may not enter into a gas supply contract with a natural gas producer to provide natural gas to Interior Alaska as a primary market unless the contract is for the benefit of a natural gas liquefaction or distribution utility that is owned by the authority or a subsidiary of the authority and the contract is for the natural gas producer to provide the utility, and only the utility, with a natural gas supply that the utility uses to serve customers in Interior Alaska.