The UN Security Council’s (UNSC) 1718 Committee on Tuesday adopted new North Korea-related designations against three vessels on suspicion of engaging in illegal ship-to-ship (STS) oil transfers.

The three tankers, the North Korea-flagged Kum Un San 3 and the Panama-flagged Shang Yuan Bao and New Regent, are subject to de-flagging and prohibited from entering the ports of UN member states in accordance with past UNSC sanctions resolutions, according to a press release.

Their assets will not be frozen, however, as has been the case for some ships in previous UN designations.

Rules prohibiting STS