Retroactive building code -deadbolt - CA

[Raman Bindlish]

I am looking for some advice on the following code :

http://leginfo.legislature.ca.gov/faces/codes_disp...

Does it apply to an old building or only to the units that are built after the code comes into affect? This is a minor issue but CA has so many such codes and I am not sure how to apply to my 1968 built duplex. Any insights would help.

Thanks 

Raman