How does this work? Is there a specific legal principle in play? Certainly some laws cannot be broken; how do you decide? Looks like these are called "exemptio

How does this work? Is there a specific legal principle in play? Certainly some laws cannot be broken; how do you decide? Looks like these are called "exemptions" and narrowly scoped to specific codes, e.g., "Exemption of Authorized Emergency Vehicles (California)" https://www.dmv.ca.gov/portal/dmv/detail/pubs/vctop/vc/d11/c1/a2/21055 https://www.dmv.ca.gov/portal/dmv/detail/pubs/vctop/vc/d11/c...