The level of free allocations given to installations whose operations have increased or decreased, as assessed on the basis of a rolling average of two years, by more than 15 % compared to the level initially used to determine the free allocation for the relevant period referred to in Article 11(1) shall, as appropriate, be adjusted.
Coigeartófar, de réir mar is iomchuí, leibhéal na saor-leithdháiltí a thabharfar do shuiteálacha a bhfuil méadú nó laghdú, mar a mheasúnaítear ar bhonn mheán rollach dhá bhliain, níos mó ná 15 % tagtha ar a gcuid oibríochtaí i gcomparáid leis an leibhéal a úsáideadh ar dtús chun an saor-leithdháileadh a chinneadh don tréimhse ábhartha dá dtagraítear in Airteagal 11(1).