The UN's top court, the International Court of Justice (ICJ), on Monday opened a week of hearings on the legal consequences of Israel's occupation of Palestinian territories.

Judges have been asked to review "occupation, settlement and annexation ... including measures aimed at altering the demographic composition, character and status of the Holy City of Jerusalem, and from its adoption of related discriminatory legislation and measures."

The advisory opinion will not be legally binding.

The UN General Assembly requested the ICJ provide the advisory opinion before the Hamas terror attacks on Israel on October 7 and the subsequent Israeli offensive in Gaza.

Israel captured the West Bank, East Jerusalem and Gaza in the Six Day War in 1967. It withdrew from the Gaza Strip in 2005, while still controlling the territory's borders.

Since 1967, Israel has expanded settlements within the occupied West Bank and annexed East Jerusalem.

The UN General Assembly asked ICJ judges to advise on how Israel's policies "affect the legal status of the occupation" and what legal consequences arise for all countries from this.

While the opinion would not be legally binding, it would carry "great legal weight and moral authority," according to the court.

Fifty states are due to address judges in the proceedings, including the United States, China, Russia, South Africa and Egypt. Israel will not participate directly but has sent written observations.

This is the second time the UN has asked the ICJ for a non-binding opinion related to Israel's occupation of Palestinian territories.

In July 2004, the ICJ found that Israel's separation wall in the occupied West Bank violated international law. Israel has not dismantled the structure.

The hearings this week are separate from a case filed by South Africa at the ICJ against Israel for allegedly violating the 1948 Genocide Convention in its military operations in the Gaza Strip.

The court ruled that Israel must do everything it its power to prevent genocide and allow humanitarian aid into the Gaza Strip but did not order a cease-fire. On Friday, it rejected South Africa's appeal to impose additional measures on Israel.