I thought, if you get higher degree from a university that is in the exempt list, you should not need to assessment, Since your undergraduate degree is accepted and verify by the university that offered the higher degree.
ozerorbay, there are many old threads here where people have spent a lot of words on what they THOUGHT an INZ rule would be, or, worse, what they thought it SHOULD be. What we each think doesn't enter into it. The important thing is to find how to present our own situation in a way that will fit through the INZ rules as they are.
INZ do not take a foreign university's entry criteria for granted. Your bachelor's degree will need to be assessed if it is not on the exempt list.