This request aims to address a methodological shortcoming in the current version of ACM0013. The methodology uses as baseline emission factor the lower value between a) the identified baseline technology and b) an emissions benchmark determined based on a defined set of power plants. In contrast to other methodologies, ACM0013 does not account for the vintage of data used to establish the emissions benchmark. The request addresses this issue by adjusting the baseline efficiency used for the time vintage between the period considered for establishing the benchmark and the start of commercial operation of the project plant. The adjustment is based on the autonomous technological improvements observed in the sector.