 In May 1955, the Board still tentatively opposed nonscheduled airlines, as demonstrated by a newly published report recommending that half their number be terminated—but by November of that year the most radical liberalizing legislation since the original loophole in the Civil Aeronautics Act of 1938 was introduced.The Board's new regulations permitted large irregular carriers, rebranded "Supplemental Airlines", to operate ten individually ticketed flights a month between any two points, without regard to frequency, regularity, route density, or any other metric.Furthermore, no limits were placed on flights chartered by a group renting the entire plane, or on transporting cargo.