The company I work for for the last 3 and a half years now wants to start drug testing and says if I don't sign the paperwork I will be sent home until I comply
The original owners of the company never had this rules before

Thank you for your question.

A company may have an implied right to drug test, depending on the nature of your workplace and the circumstances in which they are implementing it. That being said, if they are asking you to sign paperwork consenting to it and you decline to consent, it would be illegal for the company to penalize you in response. Before taking any action in response, please contact us at the number below for a consultation.