the state, for the first time, and then did something called the international residential code, irc, and it applies to one and two-family dwellings. they adopted the code because many small towns and cities around the state primarily have some division construction, construction on lots that do not require the complexity that san francisco has. this is the san francisco building code. that is a substantial piece of documentation for a small builder in tracy to build a subdivision. so the state wanted to come up with a simple way for builders, designers, to build these homes without having all of the special requirements. this would apply to one, two- family dwellings separated by a property line up at least 3 feet or separated from and the adjoining building by at least 6 feet on another parcel. no more than three stories high, so on. it turns out, we do not have many laws in san francisco where you are building a new building, 3 feet from the adjacent property line, 6 feet from another parcel. so our big challenge was trying to figure out how you have this new, focused presidential