The Flemish, Walloon and Brussels authorities have committed themselves to launching respectively 10, 10 and 4 pilot projects between 2020 and 2022. In addition to the "official" pilot projects, there are various administrations that are going to work with the CO2 Performance Ladder anyway.
https://dewerkvennootschap.vlaanderen/
https://www.vlaamsewaterweg.be/
https://departement-mow.vlaanderen.be/nl
https://overheid.vlaanderen.be/facilitairbedrijf