Have done so and there seems to be some very different views on them, which is why I was looking for a printed version to set the foundation for my game to use them and evolve from. That and being able to use it to describe to my potential play group and point at and reference.
If you’re looking for some examples etc, here’s 2 links about declarations in another system, the Fate system
http://www.faterpg.com/dl/sotc-srd.html#assessment-and-declaration
http://www.faterpg.com/dl/sotc-srd.html#setting-declaration-difficulties