Conversation so far:
What happened in 1993 for Autechre?
In 1993 Warp released their debut album, Incunabula
How did the album Incunabula by Autechre do?
Incunabula became a surprise success, reaching the top of the UK Indie Chart.
Did Autechre's album Incunabula have any hit singles?
An EP of remixes of Incunabula's Basscadet was released in 1994
What was Autechre's greatest accomplishment after their album Incunabula was released?
The Anti EP was released shortly before Amber and is, as of yet, the only Autechre release to have an explicit purpose:
What was Autechre's Anti EP's purpose?
it was a protest against the Criminal Justice and Public Order Act 1994, which would prohibit raves
What is the most important fact in the Autechre article regarding the Anti EP?
Rave music was defined as music which includes sounds wholly or predominantly characterized by the emission of a succession of repetitive beats“.

Question: who said this?
Self-contained rewrite: Who define Rave music as music which includes sounds wholly or predominantly characterized by the emission of succession of repetitive beats?