If this is a rental unit then I would be very careful about checking into the laws/codes in doing this. I know in some areas it is illegal to do electrical work on a rental property without being licensed even if you have permission from the owner or if you own the property yourself. If you do the work then you are liable for any problems down the road. Having said that, I also know things like this are done all the time & if done correctly will never have a problem.