These rules are adopted pursuant to chapter 145, Laws of 1984 and RCW 46.37.467 to provide for an identification placard to be issued for vehicles using an alternative fuel source.

The provisions of these rules shall apply to every automobile, including buses, truck, motorcycle, motor home or off-road vehicle that is fueled by an alternative fuel source.

(1) "Alternative fuel source," as used in this chapter, includes: Propane, compressed natural gas, liquid petroleum gas, alcohol, or any chemically similar gas, but does not include gasoline or diesel fuel.

(2) "National Fire Protection Association" means the nationally recognized organization dedicated to fire safety and development of standards for fire protection and safeguarding of hazards, whose headquarters are located at Batterymarch Park, Quincy, MA 02269.

Until such time as the National Fire Protection Association issues a specific placard for a specific alternative fuel source, the placard designed by the state fire marshal, as set out in these rules, shall be required.

The placard shall be a weather resistant, diamond shaped label, 4-3/4 inches long and 3-1/4 inches wide. Lettering shall be a minimum of one inch in height, and centered horizontally across the placard. The label shall be of contrasting reflective luminous material and have a 1/8 inch border.

The placard for propane or liquified petroleum gas shall include the lettering "propane." Lettering and border shall be silver on a black background. The placard for compressed natural gas shall include the lettering "CNG" across the center. The border and lettering shall be silver on a blue background.

The label shall be placed on an exterior vertical or near-vertical surface on the lower right rear of the vehicle (on the trunk lid of a vehicle so equipped, but not on the bumper of any vehicle) inboard from any other markings. The label shall be provided with a good quality self-adhering adhesive.

If any provision of these rules or its application to any person is held invalid, the remainder of the rules or the application of the provision to other persons or circumstances is not affected.