Sec. 6. (a) A lease under this chapter may provide that:
(1) as part of the lease rental for the facilities, the municipality shall agree to:
(A) pay all property taxes and assessments levied against or on account of the facilities; and
(B) maintain insurance on the facilities for the benefit of the lessor; and
(2) the municipality shall assume all responsibilities for the operation, maintenance, repair, alteration, and extension of the facilities.
(b) However, the lease rental and the expenses incurred under this chapter are payable solely from the revenues derived from sewage and sewer fees to be collected by the municipality from property and users in the area served by the facilities.