Another major change to BBC production methods in all areas, but particularly affecting drama, occurred the passing of the Broadcasting Act 1990, which amongst other things obliged the BBC to commission 25% of its output from independent production companies. Many BBC drama productions were subsequently outsourced to and commissioned from independent companies, although the BBC's in-house production arm continued to contribute heavily, with the separate Drama Series and Serials departments remaining intact. Production arms such as costumes, make-up and special effects were all closed by the early 21st century, however, with these services now being bought in from outside even for in-house programmes.