This Recommendation, which forms part of the L.1400-series, consists of two parts : " Part I: The methodology for calculating the ICT sector footprint with respect to life cycle GHG emissions; " Part II: The methodology for defining a GHG emissions budget for the ICT sector considering a 2ºC or lower trajectory. It also applies the methodology of Part I and gives an example of a partial ICT sector footprint derived in line with this Recommendation (Appendix IV).