No fixed mounted poles or other obstructions which prevent the removal of shopping carts shall be used either inside or outside of any building constructed prior to 1988 unless there is at least one opening that is a minimum of thirty-six inches wide at the main entrance to such building which permits easy access and egress by handicapped persons in wheelchairs. No such poles or other obstructions shall be used in a manner which prevents the use of curb cuts by such handicapped persons.