The International Air Transport Association (IATA) looks forward to the entry into force of Montreal Protocol 2014 (MP14) on 1 January 2020. MP14 enhances the capacity of states to curb the escalation in the severity and frequency of unruly behavior on board aircraft. This follows the 26 November 2019 ratification of MP14 by Nigeria, the 22nd state to do so.
MP14, properly named the Protocol to Amend the Convention on Offences and Certain Other Acts Committed on Board Aircraft, is a global treaty that strengthens the powers of states to prosecute unruly passengers. It closes a legal gap under the Tokyo Convention 1963, whereby jurisdiction over offenses committed on board international flights rests with the state where the aircraft is registered. This causes issues when unruly passengers are delivered to the authorities upon landing in foreign territories.
Collected and summarized from the source below by Quynh Hoa https://www.iata.org/pressroom/pr/Pages/2019-11-28-01.aspx