The custodian's contract is retroactive to 2007 and lasts through 2016.
I have one question for anybody who has a good relationship with their custodian:
Do the custodians have to wait until 2020 to get their retroactive money like we do?
Press reports are silent on this question but I think it is important.
UPDATE: As Unity Must Go stated in the comments, I spoke to one of the custodial staff at Hillcrest High School, where I am temporarily assigned, and he confirmed that the payments are stretched out so the UFT pattern holds for them.
I will just add the comment from Unity Must Go in full to the posting.