At first the city state of Athens was not ready to accomodate all the new immigrants and arrivals that were coming into athens, athens was a great destiny for many people because of it was known as a kind city towards slaves, they´d even be freed after a certain time of service, and when people started arriving there weren´t enough houses to accomodate them, so they started to build huts to have a place to live.
After it is vetoed it will go back to the senates who wanted the law and they will think about it again, then they will send it back and see if its approved or vetoed.