Yes. Sustainable Development Goal contributions shall be demonstrated for the representative baseline situations of the project activity. If the project-specific baseline information does not exist anymore, the assessment shall be carried out, if justified, using representative example cases or based on documented evidence.
For example, for an improved cookstove activity, the assessment shall be carried out based on households that are still representative of project baseline situation (i.e., using baseline cookstoves and are of same socio-economic circumstances of the project technology users); for a renewable energy activity, the assessment can be based on documented evidence related to the project activity, which can provide sufficient information to justify the selected SDG contributions.
In all situations, the sustainable development assessment shall be based on auditable and verifiable documentation and convincing arguments based on representative circumstances.