W. Va. Code § 33-20-4
(a)
(3) Subject to §33-20-4(a)(4) and §33-20-4(a)(5) of this code and the requirements for ratemaking in §33-20-3 of this code, the following commercial lines insurance coverages are exempt from rate-filing requirements under this article with respect to every manual, minimum, class rate, rating schedule, or rating plans, and every other rating rule and modification of any of the foregoing, whether the insurance coverage is endorsed to, or otherwise made part of, another kind of insurance policy or sold as a stand-alone policy:
(4) The exemptions from rate filing requirements in §33-20-4(a)(3) of this code are not applicable to the following kinds of commercial insurance:
(b) Every filing shall state the proposed effective date and shall indicate the character and extent of the coverage contemplated. When a filing is not accompanied by the information upon which the insurer supports the filing and the commissioner does not have sufficient information to determine whether the filing meets the requirements of this article, he or she shall require the insurer to furnish the information upon which it supports the filing and in that event the waiting period shall commence as of the date the information is furnished. The information furnished in support of a filing may include: