u/Atmosphery2255

I recently got yelled at by a cross walk guard in a school zone because I switched lanes. I properly signaled and the merge itself was executed safely. They told me "You can't switch lanes!" as I was driving by. Ive never heard of a law like this before so I tried searching for it online. I can't find anything regarding lane switching in a school zone in Utah. Would anyone happen to know if this is a law? I would like to know for the future.