Under the rules, airlines would have been required to reduce their emissions from 2006 levels by 3 percent before 2013 and 5 percent by 2020.
The enforcement mechanisms and fines for noncompliance are similar to cap-and-trade proposals environmentalists once tried to push in the United States.
Thune sponsored a bill with Sen. Claire McCaskillClaire McCaskillWashington Post reporter compares DC rioters to Boston Tea Party Dem senator: Violent inauguration protesters ‘disgusting’ Five things to watch for in Mnuchin hearing MORE (D-Mo.) to block the EU from applying the emission trading requirement to U.S. airlines.
To win support from those opposed to blocking the requirement, like Sen. John KerryJohn KerryObama released 1M to Palestinians in final hours Fox News signs ex-Kerry adviser Marie Harf as contributor How Trump can defend the US against information warfare MORE (D-Mass.), Thune and McCaskill added a provision to their bill instructing the ICAO to address airline emissions separately.
The Senate's version of the bill was never married with the version of the legislation that was approved by the House last year. The lower chamber's version of the measure did not include appeals for a replaced emission system.