sdsearch

Your question is confusing, because the categories are all getting rearranged in August, it's not clear if you're asking about pre-August categories or post-August categories.

And onpeak and offpeak don't start until 2019 according the chart of post-August categoriesl

And after August, the whole reason the certs are going to be points-based rather than catagory-based is because of those off-peak and on-peak rates (coming up in 2019).

So unless you're booking pre-August, categories don't enter the picture. A given cert moves between categories automatically as 35k or 50k gets ruled in or ruled out by off-peak or on-peak rates. So a 35k cert is good for any hotel that is asking for 35k or less points per night on a particular date, no matter which category that hotel is in.