The U.S. has announced new carveouts across a range of unilateral and U.N.-related sanctions programs to facilitate global humanitarian assistance to North Korea and other states. But experts say more changes are needed for in-country activities.

The Department of the Treasury listed amendments to four categories of existing U.S. exemptions on their website Tuesday following a U.N. Security Council resolution earlier this month calling for other member states to modify the way they implement sanctions.