Numerous changes, but the basic architecture maintained. The European Commission revealed its draft amendment to the EU ETS Directive delineating rules for the EU ETS fourth trading period (2021-2030).
What are business models ramifications? Among wide spectrum of elements of the EU post-2020 low carbon framework the fact that EUAs issued from 1 January 2013 onwards will be valid indefinitely (and not replaced - as before) does not represent a qualitative change since these are rather technical details.
No doubt, point deserving to take a closer look in the first place is modified design for products benchmarks.