Firstly, neither the statute on which the governor relies nor any other statute which pretends to give him the authority to make law, are valid. Lawmaking authority is vested in the legislative branch and cannot be "delegated" nor transferred in any way to the executive branch.
Secondly, the legislature cannot, by means of "pretended" legislation, confer upon the governor "pretended" authority which supersedes the limits on his authority established under their state’s constitution.
Thirdly, executive orders, which are otherwise valid, apply only to those in the executive branch of government, not to the general public.
For these reasons, there exists no "law" requiring the wearing of face-masks. Statements made by government officials or media or businesses to the contrary are inaccurate and misleading.