Teaching SAS isn't like opening a medical practice. There's no government agency setting minimum standards to teach SAS (outside of a school system that requires teaching credentials). So yes, you can teach a SAS class. That doesn't mean you'll be good at it.
There are people with the certification who would do a bad job of teaching SAS, and people without the certification who would be great teachers. It's more a question of whether you're a good teacher than whether you can pass a certification test.
What do you want to do that causes you to ask this question?