1. a. Every person who operates a vessel on the waters of this State with a child 12 years of age or under on board shall have the child wear at all times a properly fitted United States Coast Guard approved personal flotation device whenever the vessel is underway.
b. Any person guilty of violating this act shall be fined not less than $25 or more than $50.
c. The operator of a vessel shall not be guilty of a violation of this act if a United States Coast Guard flotation device of a size to properly fit the child is not commercially available.