On May 1st 1994 a new waste management licensing act became law which required any operator who deposited, recovered or disposed of waste required a waste management licence (WML) or exemption. If you operated without either of these then you could be fined and sent to prison. A WML can be applied for and issued by the relevant regulatory authority usually SEPA or the EA.
Ferry Corsten biography
Article on the life, production work and many aliases of trance producer Ferry Corsten.