Query: when did the bill become a law? 
Context: There were a number of abortive "Kill the Bill" demonstrations. The Spiral Tribe at Castle Morten was probably the nail in the coffin for illegal raves, and forced through the bill, which became law, in November 1994. The music continued to grow and change, as typified by Leftfield with "Release the Pressure", which introduced dub and reggae into the house sound, although Leftfield had prior releases, such as "Not Forgotten" released in 1990 on Sheffield's Outer Rhythm records.