[toomuchtodo]

Because a proximity card is no different than a physical key, and any door that uses a proximity card is going to use an electric strike plate which is already in use to allow tenants to buzz guests in remotely.

I admit there may be some batshit insane locale that prohibits RFID access control, but its not a concern for almost everyone else.

Disclaimer: I have been a landlord previously, in several Illinois cities.

[UrMomReadsHN]

Holy crap, yes, I agree, proxcards are the same as physical keys and are no more or less secure or insecure. Everything its benefits and weakness. However, its worth taking 5 minutes to consult your laws to see if what you're doing is legal even if it "should" be. Laws can be (and are all the time) written by people who don't understand the issues at hand. An ounce of prevention is worth a pound of cure, and all that. You don't want to (potentially) have issues down the line that are very very easily preventable.

I deal with extremely detailed regulations and policy on a regular basis (I work in a very regulated field) and we MUST do things that are very specific all the time. We need to follow the letter of the law (not just the intention). Looking up "hey, can I do this?" is part of my job, so I'm ALWAYS thinking that way. Policy is usually one step back from new technology. You may have laws and regulation that details specific technologies that may be used in different applications.