Wireless Telegraphy Act is (with its variations) a stock short title used for legislation in the Republic of Ireland, South Africa and the United Kingdom relating to wireless telegraphy. The Wireless Telegraphy Acts are laws regulating radio communications in the United Kingdom. Wireless telegraphy as a concept is defined in British law as "the sending of electro-magnetic energy over paths not provided by a material substance." The current (2018) supervisor of the UK's electromagnetic spectrum is the communications regulator, Ofcom.