Policy lets you sanction individual regions of a country by saying the port of entry or destination port is subject to sanctions. So you can take a ship with X

Policy lets you sanction individual regions of a country by saying the port of entry or destination port is subject to sanctions. So you can take a ship with X to Russia proper, but not to Crimea. Or you can work with a Russian bank, but not a Russian bank based in Crimea. It's like how Hong Kong is considered a separate territory, despite being a part of China.