We have a client that wishes to start on LEED O+M immediately but needs to complete certification before the end of year (12/31/2023) for ESG reporting reasons. Assuming that their building(s) have adequate metering for this system, can the 365 day reporting/survey period start retroactively, from fall 2022? Will there be a disadvantage to that? It seems like in version 4.1, you are as good as your most recent performance data, correct? 

Thanks for your help!