Restricted Service Licence

A UK Restricted Service Licence (often called an RSL), is typically granted to radio stations and television stations broadcasting within the UK to serve a local community or a special event. Licences are granted by the broadcasting authority Ofcom (formerly the Radio Authority and the Independent Television Commission, respectively).

In 1972, the Independent Broadcasting Authority was created and given responsibility for regulating independent television and radio services in the UK. Over time, the demand for local services increased, and finally prompted an Act of Parliament to deregulate the respective industries and facilitate new long-term and short-term broadcast licences. In 1990, the Broadcasting Act 1990 became law, and led to the establishment of two licensing authorities: the Radio Authority to license new radio services and monitor existing licences, and the Independent Television Commission, to license new short-term television services. While the 1990 act proved successful, licensing procedures to this day remain restrictive compared to those in other countries.

In 2004, the Radio Authority and ITC were folded into the Office of Communications. Today Ofcom handles all licensing for frequencies used by television and radio services. Until May 2015 short-range broadcasts and wireless links, and other programme makers frequencies were licensed by JFMG (Joint Frequency Management Group), owned by Arqiva. In May 2015 Ofcom made the decision to end the contract with Arqiva and to insource the existing services.

Short-term RSLs are typically broadcast on low-power FM (1 W–25 W) or AM (1 W) and can generally last a maximum of 28 consecutive days and can only be applied for twice in twelve months with four complete months separating the two broadcast periods (and only once in twelve months inside Greater London) by the same applicant/group.

They are generally used for special events, sporting events, religious festivals, student radio, hospital radio or to trial a radio project in preparation for an application for a permanent licence. Long-term RSLs (typically broadcast on low-power AM, but more recently in remote areas on low-power FM as well) are used for radio stations broadcasting to closed areas of private land such as university campuses and hospitals. They can be compared with the Low-power broadcasting movement in the United States.

...
Wikipedia