Michael
I cannot say for a fact, however, electric water heater must have, A/C must have. Most motion detection and/or photo cell lights are a single unit, and have a light switch.

Industrial equipment that is automatic has a sigh that states
"This equipment may start up at any time
to be serviced by qualified and authorized personal only"
or something to that effect.

I said "I cannot say for a fact". But I hold a Low voltage contractors license ( burglar /fire alarms, intercoms, video, etc.). It also covers control systems for automatic equipment used in industry (most are low voltage). I don't work on the industrial controls, but I did have to study it in order to get my license.
It is an OSHA requirement for industry, and I would think (hope), required for homes.

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Rick Cantrell
Columbus GA