Under a time charter, what kind of countries is a time charterer often prohibited from sending the chartered ship to?

Any country where a port call may bring increased financial or other risks (e. g. of detention) to the shipowner, or a risk of the ship being subsequently barred from another country's ports, e. g. Israel, Persian/Arabian Gulf, Cuba, Vietnam, Kampuchea, North Korea, Lebanon, Angola, Namibia, Syria, Libya, Somalia, Ethiopia and South Africa.