In Burlington we issue a 236 Form on incident response where smoke / CO alarms are noted in violation. The Form directs them to comply and provides 48 hours. The Captain has the discretion to install or call the PC to arrange install (say if no detection at all). We’re swaying away from installations and definitely never do hard-wired installs. It is the owners legal obligation. When the average house in Burlington is 600,000 and up we figure one can make the required arrangements / payment for installing. I’m available to discuss further by phone.