<ul><li><a href=http://www.legislation.gov.uk/ukpga/1990/42 target=_blank>Broadcasting Act 1990(last updated in April 2017, Sections 15 - 16)</a></li><li><a href=https://www.ofcom.org.uk/manage-your-licence/tv-broadcast-licences target=_blank>Ofcom website: TV broadcast licences</a></li></ul>