$10.)$ NFPA passed the Life Safety Code in $1976$ that required smoke alarms in every home. In $1988,$ the major building code organizations in the U$.$S$.($BOCA $-$ NBC$,$ ICBO $-$UBC, SBCCI $-$ SBC$)$ all required interconnected smoke alarms in all sleeping rooms $($e$.$g$.$ bedrooms$).$ NFPA stated the requirement in $1999$ to have all smoke detectors be replaced after $10$ years. Note here in Southern Nevada that the current building codes are the International Building Code $($IBC$)$ that governs commercial buildings, apartments, and condominiums and the International Residential Code $($IRC$)$ that governs residential housing such as duplexes or single$-$family residences. Today in $2024$ it is estimated that $95\%$ of all residential housing in the U$.$S$.$ has smoke alarms. However it is also estimated that, for a variety of reasons, $30\%$ of these smoke detectors are not working. What would be three possible and distinct reasons for this $30\%$ nonworking number?