RIO DE JANEIRO (AP) — If you have been to Rio de Janeiro’ beaches, this probably sounds familiar: samba music drifting from a nearby kiosk, caipirinha cocktails sold by hawkers, chairs sprawled across the sand. Now that may become harder to find, unless the vendors have the right permits. Mayor Eduardo Paes issued a decree in mid-May establishing new rules for the city’s waterfront saying he wants to preserve urban order, public safety and the environment, as well as promote peaceful relations between tourists and residents.