The new customs rule applies to truck convoys chartered by the United Nations to take aid from Jordan to Gaza via Israel, seven people familiar with the matter said. Under the rule, individuals from relief organizations sending aid must complete a form providing passport details, and accept liability for any false information on a shipment, the people said.

They said relief agencies are disputing that requirement, which was announced mid-August, because they fear signing the form could expose staff to legal problems if aid fell into the hands of Hamas or other enemies of Israel.

In a parallel move, Israeli authorities have restricted commercial food shipments to Gaza amid concerns that Hamas was benefiting from that trade, the people familiar with the matter and industry sources said.

U.N. and Israeli government data show that in September, deliveries of food and aid sank to their lowest in seven months. Israeli’s military humanitarian unit, Cogat, which oversees aid and commercial shipments to Gaza, confirmed that no U.N.-chartered convoy has moved from Jordan to Gaza since Sept. 19, but a spokesperson said Israel was not blocking goods.