They could meet for example ISO 13065:2015 standard criteria, https://www.iso.org/obp/ui/#iso:std:iso:13065:ed-1:v1:en, also refers to the other Sustainable Biomass and BioEnergy standards that are present, like below and adopt the requirements from these for a country specific standard.
Forest Stewardship Council (FSC) ;
Programme for the Endorsement of Forest Certification (PEFC) ;
ISCC Biomass Certification ;
Sustainable Biomass Program(SBP) Certification ;
Better Biomass Certification