In the areas controlled by the Palestinian National Authority, it is treason to give assistance to Israeli troops without the authorization of the Palestinian Authority or to sell land to Jews (irrespective of nationality) and also non-Jewish Israeli citizens under the Palestinian Land Laws, as part of the PA's general policy of discouraging the expansion of Israeli settlements. Both crimes are capital offences subject to the death penalty, although the former provision has not often been enforced since the beginning of effective security cooperation between the Israel Defense Forces, Israel Police, and Palestinian National Security Forces since the mid-2000s (decade) under the leadership of Prime Minister Salam Fayyad. Likewise, in the Gaza Strip under the Hamas-led government, any sort of cooperation or assistance to Israeli forces during military actions is also punishable by death.