[Avodah] Prophet - mashgiach or godol hador?

[David Riceman]

I just wanted to add a point to a previous post.  According to the Rambam 
(for an opposing opinion see Ramach's hasagah on H. Sanhedrin 2:4-5) there 
are two issurim associated with a king sitting in a court: a king who is not 
of the Davidic line may not act as a judge at all, and a king of the Davidic 
line may not act as a member of the Sanhedrin.  The gemara says that the 
former was a decree enacted at the time of the Hasmonean dynasty, and 
deduces the latter from a pasuk, implying that it is d'oraysa.

But according to the Rambam (H. Mamrim 2:1) Sanhedrin can redefine Biblical 
law, so even an issur d'oraysa can have a date when it began.  It is 
possible that the Rambam held that even though there is now an issur 
d'oraysa of a king sitting in a Sanhedrin, that issur did not exist at the 
time of David and Solomon (H. Eiruvin 1:2).

David Riceman