W. Va. Code § 31-2B-3: Repair and maintenance; exemption.

Any railroad company operating a caboose to which the illumination requirements of section two of this article apply shall not be in violation of said article if the failure of lighting equipment required under the provisions of this article is corrected at the first point maintenance supplies are available, or in the case of repairs, the first point at which materials and repair facilities are available and repairs can reasonably be made.