My brother! Please double check before claiming it on the law! You are wrong brother:
Protected persons (including members of the protected PTR class) and their accompanying family members in Canada and abroad are required to undergo a medical examination [
R30(1)(a)].
ALL protected persons are NOT required to take the medical exam IF 1) they have an unexpired medical exam 2) it is valid.
In our case, it is expired and is invalid but due to processing time issues they don't ask for it again. I contacted IRCC about this specifically and they said our medicals are OK if we did not leave Canada and lived in a "designated country" for more than six months after a positive NOD and receiving subsequent RTD.