(1) The commission shall retain toll charges on any existing and future facilities constructed under this chapter and financed primarily by bonds issued by the state until:
(a) All costs of investigation, financing, acquisition of property, and construction advanced from the motor vehicle fund have been fully repaid, except as provided in subsection (2)(b) of this section;
(b) Obligations incurred in constructing that facility have been fully paid;
(c) The motor vehicle fund is fully repaid under RCW 47.46.140
(d) The accounts from which moneys are provided to reduce the debt service according to RCW 47.46.190
(5) are fully repaid.
(2) This section does not:
(a) Prohibit the use of toll revenues to fund maintenance, operations, or management of facilities constructed under this chapter except as prohibited by RCW 47.56.245
(b) Require repayment of funds specifically appropriated as a nonreimbursable state financial contribution to a project.
(3) Notwithstanding the provisions of subsection (2)(a) of this section, upon satisfaction of the conditions enumerated in subsection (1) of this section:
(a) The facility must be operated as a toll-free facility; and
(b) The operation, maintenance, upkeep, and repair of the facility must be paid from funds appropriated for the use of the department for the construction and maintenance of the primary state highways of the state of Washington.