council act novemb draw basi articl convent establish european polic offic europol convent protocol amend convent council european union regard convent establish european polic offic europolconvent articl thereof regard initi kingdom denmark regard opinion european parliament regard opinion manag board europol pursuant articl treati european union period year entri forc treati amsterdam council promot cooper number area inter alia europol tamper european council octob state europol kei role respect cooper member state author field cross border crime investig support union wide crime prevent analys investig european council call council provid europol support decid draw attach protocol amend convent establish european polic offic europol convent sign todai repres govern member state recommend member state adopt protocol accord respect constitut requir brussel novemb council presid castelli oj oj opinion deliv april publish offici journal opinion deliv octob addit opinion deliv june declar council council agre instruct europol deal quot fraud quot form crime refer annex europol convent confer tax fraud custom fraud concern compet europol field improv effect cooper compet author member state respons function crimin law enforc system author respons ensur levi tax custom duti