New sectors and new entrants in the third trading period will have a guaranteed minimum access of 4.5 % of their verified emissions during the period 2013 - 2020. (ec.europa.eu)
There were 15 trading periods in total, plus an additional practice period at the beginning. (nature.com)
That means that bad as retail performance has generally been over the peak trading period it wasn't worse than expected. (totalpolitics.com)