more on that right now is bill strawn, it's good to see you from san francisco kept building inspection. this is such an important issue if people don't know about this. let's talk about the law. when was this law passed and i know it went into effect in july? >> i think it was probably an 18-month cycle before it became effective. since july 1, everybody has been full force of letting people know bit. >> was this way from the beginning? >> i don't think so. it's the nature of law making takes some time. >> cheryl: so how does the law apply? >> the initial part starts with residential homes. that started july 1. january 1 of 2013 they will go to commercial building and multiple unit buildings such as apartment buildings. >> i notice we've got some certificates that say self-certification of smoke alarms and carbon monoxide alarms. this is kind of draft? >> exactly. what we're trying to do is make it as easy as possible for homeowners anderty managers to do themselves, their families and tenants a favor and get these installed. they are simple and easy to do. they save lives. i think we'