§ 1399-ww. Separability. If any item, clause, sentence, subparagraph, subdivision, section or other part of this act, or the application thereof to any person or circumstances shall be held to be invalid, such holding shall not affect, impair or invalidate the remainder of this act, or the application of such section or part of a section held invalid, to any other person or circumstances, but shall be confined in its operation to the item, clause, sentence, subparagraph, subdivision, section or other part of this act directly involved in such holding, or to the person and circumstances therein involved.