(1) For the purposes of this section:

     (a) "Alcohol fuel" means any alcohol made from a product other than petroleum or natural gas, which is used alone or in combination with gasoline or other petroleum products for use as a fuel for motor vehicles, farm implements, and machines or implements of husbandry.

     (b) "Anaerobic digester" has the same meaning as provided in RCW 82.08.900.

     (c) "Biodiesel feedstock" means oil that is produced from an agricultural crop for the sole purpose of ultimately producing biodiesel fuel.

     (d) "Biodiesel fuel" means a mono alkyl ester of long chain fatty acids derived from vegetable oils or animal fats for use in compression-ignition engines and that meets the requirements of the American society of testing and materials specification D 6751 in effect as of January 1, 2003.

     (2)(a) All buildings, machinery, equipment, and other personal property which are used primarily for the manufacturing of alcohol fuel, biodiesel fuel, biodiesel feedstock, or the operation of an anaerobic digester, the land upon which this property is located, and land that is reasonably necessary in the manufacturing of alcohol fuel, biodiesel fuel, biodiesel feedstock, or the operation of an anaerobic digester, but not land necessary for growing of crops, which together comprise a new manufacturing facility or an addition to an existing manufacturing facility, are exempt from property taxation for the six assessment years following the date on which the facility or the addition to the existing facility becomes operational.

     (b) For manufacturing facilities which produce products in addition to alcohol fuel, biodiesel fuel, or biodiesel feedstock, the amount of the property tax exemption shall be based upon the annual percentage of the total value of all products manufactured that is the value of the alcohol fuel, biodiesel fuel, and biodiesel feedstock manufactured.

     (3) Claims for exemptions authorized by this section shall be filed with the county assessor on forms prescribed by the department of revenue and furnished by the assessor. Once filed, the exemption is valid for six years and shall not be renewed. The assessor shall verify and approve claims as the assessor determines to be justified and in accordance with this section. No claims may be filed after December 31, 2009, except for claims for anaerobic digesters, which may be filed no later than December 31, 2012.

     The department of revenue may promulgate such rules, pursuant to chapter 34.05 RCW, as necessary to properly administer this section.

[2008 c 268 § 1; 2003 c 261 § 9.]

NOTES:

     Effective date -- 2008 c 268: "This act takes effect July 1, 2008." [2008 c 268 § 3.]

     Application -- 2003 c 261 § 9: "Section 9 of this act applies to taxes levied for collection in 2004 and thereafter." [2003 c 261 § 12.]

     Effective dates -- 2003 c 261: "(1) Sections 9 through 15 of this act are necessary for the immediate preservation of the public peace, health, or safety, or support of state government and its existing public institutions, and take effect July 1, 2003.

     (2) Sections 1 through 8 of this act take effect July 1, 2004." [2003 c 261 § 13.]