The activists had set out to protest Israel’s ongoing military campaign in the Gaza Strip, which is among the deadliest and most destructive since World War II, and its restrictions on the entry of aid.
In November 1967 the Israeli authorities issued Military Order 158, which stated that Palestinians could not construct any new water installation without first obtaining a permit from the Israeli army. Since then, the extraction of water from any new source or the development of any new water infrastructure would require permits from Israel, which are near impossible to obtain. Palestinians living under Israel’s military occupation continue to suffer the devastating consequences of this order until today. They are unable to drill new water wells, install pumps or deepen existing wells, in addition to being denied access to the Jordan River and fresh water springs. Israel even controls the collection of rain water throughout most of the West Bank, and rainwater harvesting cisterns owned by Palestinian communities are often destroyed by the Israeli army.
https://www.amnesty.org/en/latest/campaigns/2017/11/the-occupation-of-water/
OK, I changed it to 58 years ago! 30 years is just as far back as I personally remember it.