I'm just going off the summary document [0], but the law doesn't seem to require any particular working hours. It just says people should stick to them once they've been agreed. That's already implied by having working hours. The whole bill basically just tells the regulator that the legislature thinks the fine for not sticking to the employment contract should be up to $500 which is probably redundant since I assume the regulator (or someone, at any rate) can already fine people who don't stick to contracts. And they shouldn't need special and specific powers to fine someone for particular employment contract violations, if they're going to have power they should have general powers.

> taken to its logical extreme your argument would forbid all group negotiations, I'd think?

I don't see how the bill or anything I wrote have anything to do with group negotiations. People can negotiate as a group for all I care, as long as I can negotiate on my own.

[0] https://legislature.mi.gov/documents/2025-2026/billanalysis/...

> I assume the regulator (or someone, at any rate) can already fine people who don't stick to contracts

....what contract? There's no contract in most cases and contracts that exist very rarely define hours. I've never encountered one that did.

> seem to require any particular working hours

This isn't about enforcing hours, it's about communication during hours you're not being paid for.