I'm asked to sing this kind of stuff all the time. I'm a software guy working on contract base.
It seems almost company with headquarters in the USA has them.
Most of it is already in the constitutional laws of almost every decent country. (discrimination, sexual harassment, bribes, etc. etc.)
There are probably also some references to other documents. (to which you have to comply also)
Ask for those documents!!!
Scan those documents also for references to other document. Some of them will probably online and can change from day to day.
Again, ask for ALL these documents too.
Eventually you will find some references to documents where you don't have access to because you are not on the payroll.
There will probably also references to webpages or internal phone directories where you can file reports if they are not adhering to their own rules. (some sort of internal ombudsman)
Keep asking for all those documents and access to the online dynamic webpages which are referenced.
Don't sign anything until all of this is done by them.
In the meantime they wil start doing business with you. (money alway seems to be more important.
By the time you have everything, you are probably done doing business with them.