I was searching for a while, figuring this was already on here somewhere.. the questions about maharat were close but not what I was looking for. I'll ask it in two parts:
1) Is there a concrete halachic(Biblical?Rabbinic?) basis for women not being permitted to become Rabbis?
2) After 2000+ years, what changed so the JTS's Commission in 1979 decided that they can?
A sub-question: are they recognized by the State of Israel, or only in America?