Calculative reserve – allowances set aside to be distributed between installations in the process of the development of the Allocation plan. Those reserves are not allocated to installations after the notification to the European Commission.
Delayed installation – an installation which has been operating for at least one year in the period 2002–2004 and for which no sufficient data has been submitted for determination of emissions and allocation of allowances before 30 November 2005.
Early credits –– Emission reductions that have been verified in “Joint Implementation” projects before the beginning of the First commitment period (2008). These emission reductions should be transferred by Bulgaria to the respective country with which a bilateral cooperation agreement on Joint Implementation projects was concluded. The amounts of reduction units are transferred ain the form of Emission Reduction Units (ERU) pursuant to Article 17 of the Kyoto Protocol in the framework of the First Commitment period (2008-2012)..