Swimming is permitted in roped areas designated by lifeguards. All swimmers shall be subject to rules and regulations as from time to time established by the lifeguards. All orders of lifeguards are to be strictly obeyed. Swimming devices, such as inner tubes, air mattresses, kick boards, beach balls, snorkels, face masks and other buoyant objects or flotation devices, are prohibited except for Coast-Guard-approved life jackets securely attached to the swimmer unless used for water safety instruction during an approved class. The lifeguard may suspend swimming rights of any person who violates rules or endangers the safety of another.