The foregoing limitation on the aggregate amount of indebtedness of the state shall not prevent:
PROVIDED, That the legislature shall, at all times, provide sufficient revenues from such sources to pay the principal and interest due on all obligations for which said source of revenue is pledged.
RCW 39.42.080
Severability-1974 ex.s. c 111: "If any provision of this 1974 amendatory act, or its application to any person or circumstance is held invalid, the remainder of the act, or the application of the provision to other persons or circumstances is not affected." [ 1974 ex.s. c 111 s 6.]