The term "eligible taxpayer" does not include any person whose only activity with respect to an aerospace industrial facility is to lease it to another person or persons.
If useful life is:
The applicable
percentage is:
4 years or more but less than 6 years33 1/3%
6 years or more but less than 8 years66 2/3%
8 years or more 100%
The useful life of any property for purposes of this section shall be the actual economic useful life determined as of the date such property is first placed in service or use in this state by the taxpayer, determined for financial accounting purposes in accordance with generally accepted principles of accounting.
W. Va. Code § 11-13D-3f