For the purposes of taxation, class six is established consisting of:
1. Noncommercial historic property as defined in section 42-12101 and valued at full cash value.
2. Real and personal property that is located within the area of a foreign trade zone or subzone established under 19 United States Code sections 81a through 81u and title 44, chapter 18, that is activated for foreign trade zone use by the district director of the United States customs service pursuant to 19 Code of Federal Regulations section 146.6 and that is valued at full cash value. Property that is classified under this paragraph shall not thereafter be classified under paragraph 6 of this section.
3. Real and personal property and improvements that are located in a military reuse zone that is established under chapter 1, article 7 of this title and that is devoted to providing aviation or aerospace services or to manufacturing, assembling or fabricating aviation or aerospace products, valued at full cash value and subject to the following terms and conditions:
(a) Property may not be classified under this paragraph for more than five tax years.
(b) Any new addition or improvement to property already classified under this paragraph qualifies separately for classification under this paragraph for not more than five tax years.
(c) If a military reuse zone is terminated, the property in that zone that was previously classified under this paragraph shall be reclassified as prescribed by this article.
(d) Property that is classified under this paragraph shall not thereafter be classified under paragraph 6 of this section.
4. Real and personal property and improvements or a portion of such property comprising an environmental technology manufacturing, producing or processing facility that qualified under section 41-1514.02, valued at full cash value and subject to the following terms and conditions:
(a) Property shall be classified under this paragraph for twenty tax years from the date placed in service.
(b) Any addition or improvement to property already classified under this paragraph qualifies separately for classification under this subdivision for an additional twenty tax years from the date placed in service.
(c) After revocation of certification under section 41-1514.02, property that was previously classified under this paragraph shall be reclassified as prescribed by this article.
(d) Property that is classified under this paragraph shall not thereafter be classified under paragraph 6 of this section.
5. That portion of real and personal property that is used on or after January 1, 1999 specifically and solely for remediation of the environment by an action that has been determined to be reasonable and necessary to respond to the release or threatened release of a hazardous substance by the department of environmental quality pursuant to section 49-282.06 or pursuant to its corrective action authority under rules adopted pursuant to section 49-922, subsection B, paragraph 4 or by the United States environmental protection agency pursuant to the national contingency plan (40 Code of Federal Regulations part 300) and that is valued at full cash value. Property that is not being used specifically and solely for the remediation objectives described in this paragraph shall not be classified under this paragraph. For the purposes of this paragraph, "remediation of the environment" means one or more of the following actions:
(a) Monitoring, assessing or evaluating the release or threatened release.
(b) Excavating, removing, transporting, treating and disposing of contaminated soil.
(c) Pumping and treating contaminated water.
(d) Treating, containing or removing contaminants in groundwater or soil.
6. Real and personal property and improvements constructed or installed from and after December 31, 2004 through December 31, 2024 and owned by a qualified business under section 41-1516 and used solely for the purpose of harvesting, transporting or processing qualifying forest products removed from qualifying projects as defined in section 41-1516. The classification under this paragraph is subject to the following terms and conditions:
(a) Property may be initially classified under this paragraph only in valuation years 2005 through 2024.
(b) Property may not be classified under this paragraph for more than five years.
(c) Any new addition or improvement, constructed or installed from and after December 31, 2004 through December 31, 2024, to property already classified under this paragraph qualifies separately for classification and assessment under this paragraph for not more than five years.
(d) Property that is classified under this paragraph shall not thereafter be classified under paragraph 2, 3 or 4 of this section.
7. Real and personal property and improvements to the property that are used specifically and solely to manufacture from and after December 31, 2006 through December 31, 2023 biodiesel fuel that is one hundred percent biodiesel and its by-products or motor vehicle biofuel and its by-products and that are valued at full cash value. This paragraph applies only to the portion of property that is used specifically for manufacturing and processing one hundred percent biodiesel fuel, or its related by-products, or motor vehicle biofuel, or its related by-products, from raw feedstock obtained from off-site sources, including necessary on-site storage facilities that are intrinsically associated with the manufacturing process. Any other commercial or industrial use disqualifies the entire property from classification under this paragraph. For the purposes of this paragraph, "motor vehicle biofuel" means a solid, liquid or gaseous fuel that is derived from biological material such as plant or animal matter, excluding organic material that has been transformed by geological processes into substances such as coal or petroleum or derivatives thereof, and that:
(a) Contains fuel additives in compliance with federal and state law.
(b) Is manufactured exclusively for use in a motor vehicle.
8. Real and personal property and improvements that are used for renewable energy manufacturing or headquarters operations as provided by section 42-12057. This paragraph applies only to property that is used in manufacturing and headquarters operations of renewable energy companies, including necessary on-site research and development, testing and storage facilities that are associated with the manufacturing process. Up to ten percent of the aggregate full cash value of the property may be derived from uses that are ancillary to and intrinsically associated with the manufacturing process or headquarters operation. Any additional ancillary property is not qualified for classification under this paragraph. No new properties may be classified pursuant to this paragraph from and after December 31, 2014. Property that is classified under this paragraph shall not thereafter be classified under any other paragraph of this section.