(14)The national emission reduction commitments set out in this Directive for 2030 onwards are based on the estimated reduction potential of each Member State contained in the TSAP Report no 16 of January 2015 (‘TSAP 16’), on technical examination of the differences between national estimates and those in TSAP 16, and on the political objective to maintain the overall health impact reduction by 2030 (compared with 2005) as close as possible to that of the Commission proposal for this Directive. To enhance transparency, the Commission should publish the underlying assumptions used in TSAP 16.