Option 2: Parameters and procedures shall be established on the basis of [top performing installations or processes in the relevant sector, based on, inter alia, the performance of key technologies that are beyond common practice and technology penetration rates] [[the top [x] per cent of] the current distribution of carbon intensity for specific types of project activities or within specific sectors]. [Such parameters and procedures shall reflect national circumstances and shall be periodically adjusted].
Option 2: Parameters and procedures shall be established on the basis of [top performing installations or processes in the relevant sector, based on, inter alia, the performance of key technologies that are beyond common practice and technology penetration rates] [[the top [x] per cent of] the current distribution of carbon intensity for specific types of project activities or within specific sectors]. [Such parameters and procedures shall reflect national circumstances and shall be periodically adjusted].