A 1983 US-Ireland Extradition Treaty is also in effect. Ireland imposes precursor chemical controls in line with the US-EU Agreement on Precursor Chemical Control signed in early 1997 by which Ireland is bound. Cultivation and Production . Cultivation of narcotics in Ireland has been limited to very small quantities of cannabis. Small, but increasing numbers of marijuana plants have been seized in recent years.
Cultivation of cannabis is done indoors, using hydroponic cultivation methods.
The Irish police are concerned about the establishment of facilities used to produce psychotropic substances but, since a 1995 incident, have uncovered no evidence to indicate that this has begun. However, there is as yet no clear evidence of drug production in Ireland. Ireland is generally a terminal destination for heroin arriving, via the UK, from southwest Asia. Police report an increased flow of cannabis through The Netherlands in the last half of 1997. Record cocaine seizures in 1996 were not matched in 1997.