Article 2(4) of the UN Charter contains a general prohibition of the use of force. Articles 42 and 51 authorize departures from this prohibition in two circumstances: Security Council authorization and self-defense. These two circumstances are conceptualized as justifications. https://www.roneverhart.com/Corvette-Floor-Mats-Z06-w-Crossed-Flags-C6-Z06-2007-5-2013/