Dude, I am so sorry, that sucks so hard.
If this is standard operating procedure I am totally screwed on this job (still waiting, 76 days now) and I will lose some serious face with my client who will have to wait up to ANOTHER 90 days. Or...maybe they'll just hire someone who doesn't care about the law?!
It's completely and utterly ridiculous. It would mean they're
forcing us to wait 90 days to do a job. Because if we set start time 90 days out on a job that could be done at any point the authorization still won't be active until that start time, even if it is approved earlier.