At the time the board reviews the six-year program of each county each even-numbered year, it shall consider and shall approve for inclusion in its recommended budget, as required by RCW
36.79.130, the portion of the rural arterial construction program scheduled to be performed during the biennial period beginning the following July 1st. Subject to the appropriations actually approved by the legislature, the board shall as soon as feasible approve rural arterial trust account funds to be spent during the ensuing biennium for preliminary proposals in priority sequence as established pursuant to RCW
36.79.090. Only those counties that during the preceding twelve months have spent all revenues collected for road purposes only for such purposes, including removal of barriers to fish passage and accompanying streambed and stream bank repair as specified in RCW
36.82.070, and including traffic law enforcement, as are allowed to the state by Article II, section 40 of the state Constitution or RCW
36.82.070(2) are eligible to receive funds from the rural arterial trust account, except that: (1) Counties with a population of less than eight thousand are exempt from this eligibility restriction; (2) counties expending revenues collected for road purposes only on other governmental services after authorization from the voters of that county under RCW
84.55.050 are also exempt from this eligibility restriction; and (3) this restriction shall not apply to any moneys diverted from the road district levy under chapter
39.89 RCW. The board shall authorize rural arterial trust account funds for the construction project portion of a project previously authorized for a preliminary proposal in the sequence in which the preliminary proposal has been completed and the construction project is to be placed under contract. At such time the board may reserve rural arterial trust account funds for expenditure in future years as may be necessary for completion of preliminary proposals and construction projects to be commenced in the ensuing biennium.
The board may, within the constraints of available rural arterial trust funds, consider additional projects for authorization upon a clear and conclusive showing by the submitting county that the proposed project is of an emergent nature and that its need was unable to be anticipated at the time the six-year program of the county was developed. The proposed projects shall be evaluated on the basis of the priority rating factors specified in RCW
36.79.080.