Establishing exceptions to motor vehicle registration requirements for golf carts on Cobb Island in Charles County; requiring an operator of a golf cart on a highway on Cobb Island without a certain registration to operate the golf cart only on a highway with a maximum posted speed limit of 30 miles per hour and between dawn and dusk; requiring the vehicle to be equipped with certain lighting devices and to be kept to the far right of the roadway; and requiring the operator to possess a valid driver's license.