United Nations Secretary-General António Guterres has invoked Article 99 of the U.N. Charter in a bid to force a debate at the Security Council on a resolution calling for a humanitarian ceasefire in Gaza. Guterres’s spokesperson Stéphane Dujarric announced the move on Wednesday.

Stéphane Dujarric: “The secretary-general urges the members of the Security Council to press to avert a humanitarian catastrophe, and he appeals for a humanitarian ceasefire to be declared.”

It’s the first time Guterres has invoked Article 99 since he became U.N. secretary-general seven years ago — and just the fourth time in U.N. history.