I came across this document in the Israel State Archives when I was looking through some files on agriculture from the 1960s. It's a 1962 letter from the Jordanian Ministry of Agriculture complaining that "some farmers", especially those in the refugee camps and the "owners of coffee shops" were growing cannabis. This is obviously against the law the solution was to find it and burn it.
I never found any other documents like this at the ISA, and doubt that these sorts of things would be saved by the Jordanians. Its a shame, since they would tell a very different story about social life in the West Bank in the 1950s and 1960s.
Israel State Archives, MGA 39/19