Yes, that's necessary as well because this is the way we start. I always, personally, prefer to start with national data sources that cover all provinces first, even if there is a lot of missing information, and then I complete the national with provincial sources. At least, I start with a uniform platform for all provinces, but there is so much information that is missing.
The problem comes when you have to do a project for a specific province. We are working with the Quebec government right now to help them to achieve their target on greenhouse gas emissions for 2030 and 2050, and I had to recalibrate the whole model on their emissions inventory, which is not the same at all as the Canadian one. I have almost reallocated and renamed all my sectors and I almost had to prepare a new model just for this, which doesn't fit anymore with the rest of the Canadian model. It's very difficult.