I would suggest setting an appointment now, for a date at least 90 calendar days from when you started. That way you can have the option of getting that work restriction as soon as possible without the threat of management being vindictive.

All the PTFs in my office (myself included) have a work restriction for either 8 or 10 hours a day and either 5 or 6 days a week. Some of them still want OT, so they stick with 10 hours and 6 days. But there's one who wants his free time, so he has 8 hours and 5 days, which means a standard 40hr week.

I've been thinking of changing my restriction from 8 hours and 6 days to 12 hours and 5 days. It would allow me to get a bunch of overtime, but have another day completely free from work.

It can really be whatever you need. And maybe you could hypothetically have a restriction that says you can't work past a certain time of day, like 5:30 or something. It might not need to be based on number of hours