Place Adsense On Certain Posts

I have a bit of a dilemma. Basically in my blog I have around 3000 posts, and how I normally placed Adsense ads was using the header & footer feature for placing inside all the posts.

However I have realised some but not all of my posts are the type I cant put adsense inside basically due to their terms.

So how can I go about putting adsense ads in the top and bottom of all my posts, but not the ones which they are now allowed, is this possible?

Any help much appreciated. I have had to temporarily remove adsense altogether until I can find a solution.