Employment law

So, our new CEO has given us an Employee Manual. She expects us to sign a sheet saying that we have read it and understand what is expected of us.

The manual includes things such as:
-will give three weeks notice (legal obligation is 0 and industry standard is 2)
-following any incidents at work, will submit to alcohol blood level and drug testing (this is also illegal as I understand it)
-if prescribed a medication that could interfere with work, will inform boss immediately (this seems to me to violate privacy rights)

My feeling is that it would be inadvisable to sign this. She claims it isn't a contract, but I'm still wary of signing anything related to it.

I have no idea if it is enforceable or not... and even if it isn't, I'm still not comfortable. I take my word very seriously, and I feel that by signing this, I'd be giving my word to give three weeks notice. But, I don't feel that I'm willing to commit to that. It's not a promise I'm willing to make.

So, anyone been in a situation like this, or able to recommend a good lawyer in Toronto who works with employment law?

EDIT: Apparently when people objected to the three weeks notice thing in a meeting yesterday, she informed them that anyone giving less than three weeks notice would not get a reference from her. I'm pretty sure that IS legal... and evil.

x-posted to toronto