I think the term "survival" has a lot of meanings to various people, in varied scenarios. Most situations call for getting through an unexpected night or handling an unexpected delay in reaching relative safety. An injury could be involved, a navigation error, broken down trasportation, a wide variety of situations caused by a wide variety of reasons.

I think it would be difficult to certify a school or an instructor because the techinque could vary so much between areas, regions and reasons for being in need of "survival" skills. For instance, a pilot flying over Alaska would need skills and gear that differed greatly from someone dayhiking in the desert in cool weather. Some skills are always the same, but many are totally different. What would be the basic criteria to certify an instructor on? Basics or terrain and climate specifics?

Another aspect that could play in is legal issues. A "certified instructor" that teaches primitive skills later is sued by a student that injures themselves in a way that could be linked to that instruction. A grey area, potentially.