And fire, smoke and carbon monoxide detectors. 

I do most investing outside the city in delaware county, but i would think there is an inspection they do yearly as a run though to check for smoke detectors and things of the like. ( at least that what they do in Delco ) when they are due, you'll know for sure

In May 2017 the boiler had a backdraft and the carbon monoxide detector when off in the utility room when off so they evacuated the home and called the fire department.

(Smoke detectors, window placement, exits, etc.)

They lost the smoke detector.  

You won’t have time to build furniture in the future, you need to focus on being the director of the circus.Install smart remote WiFi looks (LockState), NEST thermostat, smoke- and carbon monoxide detector, make the place business ready (printer, desk, etc.) and start an awesome looking listing on Airbnb for free.

But the yellow of tar can also be found on smoke/CO detectors, walls, and inside heat ducts.

I know there are various state laws which make it difficult to go into a tenant's unit, but my personal experience is, find ways to get in there (you can tell them you need to replace filters, smoke detectors, ... etc).

And he  gave the maintenance  man very cross looks when he found that our smoke detectors  had never been replaced after they were damaged and removed from the flooding incident. 

Six other small things like working smoke detectors, and replace windows here and there2) 2009, $0.00Code 169017 - Repair or replace house drain to receive and convey discharges from plumbing fixtures to sewer.3) 2013, $0.00Code 169017 - Repair or replace house drain to receive and convey discharges from plumbing fixtures to sewer.