W. Va. Code § 48-1-239: Shared parenting defined.

(a) “Shared parenting” means either basic shared parenting or extended shared parenting.

(b) “Basic shared parenting” means an arrangement under which one parent keeps a child or children overnight for less than 35 percent of the year and under which both parents contribute to the expenses of the child or children in addition to the payment of child support.

(c) “Extended shared parenting” means an arrangement under which each parent keeps a child or children overnight for more than 35 percent of the year and under which both parents contribute to the expenses of the child or children in addition to the payment of child support.

(d) In any case where, in the absence of an agreement between the parents, a court orders shared parenting; the order shall be in writing and include specific findings of fact supporting the Court’s determination.