My question involves labor and employment law for the state of: Oklahoma

I'm not too sure if this goes here but it's the only place I could find. I work in Retail and....

At my work they have been known to force people to change their availability. I was wondering if this an unlawful thing to do? The policy of my company I work for falls in the line of something like, we will not change your availability without written consent (signature). So what they did was when a certain major event happens such as inventory they called people in to the main office and they had a piece of paper with their availability on it and a write up sheet also with there name written on it. The company changes their avalibility to open availability so they can make them work whenever needed. If they refuse they end up getting written up and some fired. I don't want that to happen to me.

Are there any laws against forcing someone to change there availability for work if you hired them on the availability that the employee set? I going to find the policy on that and share it with you because it is not fair.