The Government Says

Communications Act 2003: Fourteenth report on the Secretary of State's functions

Communications Act 2003: Fourteenth report on the Secretary of State's functions
Local copy of communications_act_2003_fourteenth_report_sos_functions_v2.pdf
Local copy of Communications_act_2003_fourteenth_report_sos_functions_accessible.pdf

https://www.gov.uk/government/publications/communications-act-2003-fourteenth-report-on-the-secretary-of-states-functions

seen at 11:33, 13 July in Transparency and freedom of information releases.