The Sound Broadcasting Act of 1972 gave the ITA responsibility for organising commercial radio in the UK, and reconstituted the ITA as the Independent Broadcasting Authority (IBA) with effect from Wednesday 12 July 1972.
Independent Broadcasting Authority
The IBA's status of broadcasting regulator was handed over in 1990 to Independent Television Commission (merged with several different radio and telecommunication regulators in 2003).
IBA existed until 2003 when it was disolved. The logo was rarely used at that time.