. . . "(iii) Authorize the establishment, maintenance and operation of ferries, wharves, and other structures, and marine and seashore or offshore activities intended to accelerate productivity; (iv) Regulate the preparation and sale of meat, poultry, fish, vegetables, fruits, fresh dairy products, and other foodstuffs for public consumption; (v) Regulate the use of streets, avenues, alleys, sidewalks, b" . . . .