An ICAO-approved plan requiring aircraft operators to monitor their emissions on ALL international flights beginning 1 January 2019.

A mandatory regulation requiring all non-commercial operators who travel into, out of, and between EU Member States, EEA Counties, and applicable EU Territories to monitor their CO₂ flight emissions—and possibly purchase carbon offsets.

Effective 1 January 2021, The United Kingdom put into effect a new emissions trading scheme. UK ETS for aviation is a mandatory regulation impacting specific operators, and designed to track flights to, from and within the United Kingdom.