If you've seen a list before now that purported to show what items were and were not allowed into Gaza, odds are you weren't seeing anything official, simply lists compiled by NGO's based on what people told them they could or couldn't get in. Now the Israelis have issued an official statement on what's allowable: Gaza: Lists of Controlled Entry Items. In fact, construction material, for instance, has been and still is allowed in as long as it is overseen by someone other than Hamas and tied to a particular project.