The integrated permit required under this Directive, is an individual administrative act, granting a permit for functioning of certain installations or parts of installations under certain conditions which guarantee the compatibility of the installation with regulatory requirements. The functioning of all installations covered by the emission trading scheme is authorized and defined through the integrated permit, except for combustion plants with thermal power of 20 to 50 MW. The integrated permit, issued under Directive 96/61/ЕС, is used also in the framework of the procedure on issuing of an emission trading permit, which represents a permit for functioning of installations listed in Annex 1 to Directive 2003/87/ЕС. Before the start of the procedure on issuing emission trading permits for installations covered by both Directives, those installations should obtain an integrated permit and implement the measures included in the permit to achieve compliance with the legislation in force. Some of these measures have a direct effect on greenhouse gas emissions level from these installations.