If useful life is: The applicable percentage is:
Less than 4 years ....................................33 1/3
4 years or more but less than 6 years ................66 2/3
6 years or more .........................................100
The useful life of any property for purposes of this section is determined by those methods as the tax commissioner may require as of the date the property is first placed in service or use in this state by the taxpayer.
For purposes of this section, the term "research institution" means any nonprofit educational organization which is an institution of higher education (as defined in section 3304(f) of the Internal Revenue Code of 1986, as amended), a West Virginia institution of higher education subject to the jurisdiction of a board described in article two-a, chapter eighteen-b of this code, or any other nonprofit organization exempt from federal income taxes which is organized and operated primarily to conduct scientific research and is not a private foundation for federal income tax purposes.
W. Va. Code § 11-13R-4