If you are taking the NY state test and they have a study guide, you study and learn what the state says. What you practice is not in any way related to the test.
If I followed what my state says I would not be a rehabber, I'd be a mistress of death!
You study for the test, instructors teach the test...then when you have your license you do what works for you (providing it is nutritionally appropriate for the specie).
Personally, I follow NWRA and IWRC which is written by Erica Miller, DVM. But that is what I do and that is what works for me.
And, an example of what I said above...what works for you....on the test for my state there is a question about rehabbing bunnies.
Do you do feed bunnies
A. XYZ formula,
B. ABC formula,
C. EFG formula,
D. Whatever works for you.
The correct answer for the state test here in my state is D.