A new US anti-terror law that has forced the majority of American-funded aid operations in the Occupied Palestinian Territories to grind to a halt may have even wider humanitarian consequences, leaving nonprofits around the world more vulnerable to litigation. While the 700-word bill appears to have been targeted at the Palestinian Authority, which governs the West Bank, experts say the Anti-Terrorism Clarification Act, or ATCA, is poorly crafted and could result in some non-governmental organisations and businesses being reluctant to take US funding or be associated with US-financed programs. Samuel Oakford explores for IRIN.