Prime minister under fire for ongoing crackdown
Gender Change Act was in place from 1985 to 2014
'Today is a momentous day in history'
Vote took place two days after presidential election's first round
Idan Roll, 37, lives in Tel Aviv with husband, two children
Advocacy group challenged Section 1448 of country's Civil and Commercial Code
Voters on Sept. 26 overwhelmingly approved 'Marriage for All' statute
