I work a job where I am assigned high value tracked equipment. I also work offsite from our main office. Supervisors are wanting me to stop at the primary work location on my way to my work site for inventory. Most other employees in my position don't seem to mind but I'm a little miffed. They are arguing with me that it doesn't break the law and I say its in violation of labor law to require me do do this off the clock. So when I argue again, what specific law prohibits this?