In a short–term rental unit, a short–term rental host shall: conspicuously post an evacuation diagram identifying all exits from the short–term rental unit and, if applicable, the exits from the building in which the short–term rental unit is located; conspicuously post a list of emergency telephone numbers for law enforcement and fire rescue services; provide a working fire extinguisher in the short–term rental unit; and provide working smoke alarms and carbon monoxide alarms in the short–term rental unit. Subject to paragraph (4) of this subsection, a smoke alarm or carbon monoxide alarm required under subsection (a) of this section shall be installed and maintained in accordance with State, county, and municipal fire codes. If multiple smoke alarms are required to be installed and maintained in the short–term rental unit, each smoke alarm shall: be interconnected with other smoke alarms so that the activation of one smoke alarm activates all smoke alarms in the short–term rental unit; or comply with an alternative requirement authorized by the State Fire Marshal in consultation with the State Fire Prevention Commission. When activated, a smoke alarm or carbon monoxide alarm required under this section shall sound an alarm that is: clearly audible in all sleeping rooms and sleeping areas in a short–term rental unit; and loud enough to be heard over background noise and with all doors closed between the sleeping rooms in a sleeping area and the smoke alarm or carbon monoxide alarm. A smoke alarm or carbon monoxide alarm required under this section shall be replaced if the smoke alarm or carbon monoxide alarm: stops functioning; is more than 10 years old based on the production date marked on the back of the device; or has no production date on the back of the device.