Actually I got written up and not shown any policy in place with cigs liquor and hazardous chrmcinsls it's mandatory for handbook because it covers everything specially clean up of hazard materials
You are speaking to the MSDS, that is a federal law. It requires all companies to have a list of hazardous materials and their process for clean up. It only pertains to items sold not what you bring in.
Does your store sell cooked food (nachos, hot dogs, or even fountain drinks) that require a health department inspection? If so, as you will notice in your list, places serving food have a ban on vaping.
If you have worked without breaks/lunches, that is on you. The law is what it is, you should have contacted your local wage and hour board, not blindly complied. While it isn't right to not have breaks and lunches, you also knew that but worked through.
There's a rule in the work place I used to tell new guys. If you want more money work like you are making more money. If your mentality is I make $7 an hour and that's all I'm gonna do, that's all you're ever gonna make.
Here's the ugly short of it. You have worked without a company following the law, you said nothing yet knew it was wrong. The company was taken over and you reapplied, more than likely there were rules listed somewhere. If not, it was your responsibility to get clarification of rules/regulations, as well as clear up the previous not following the law.
I'm not trying to but a jerk but is the avatar you have a pic of you? If so you're lucky to have a job, most places won't hire people with tattoos like yours. The reason being they speak to possible background and forced employment of a institution. Not knocking you, I have plenty of tattoos and piercings. I also have experience working with (and related to) people in (or been in) the system, the whole I need the rules spelled out in front of me kind of speaks to it to.
Sometimes it's best to lose the battle to win the war. One write up isn't a thing as most places give three. Do what they say and get paid or move to better employment. They don't have to let you vape and the bonus is you don't have to work for them. Ask yourself, do you have a job or a career? Jobs are a dime a dozen, careers are what matter.