Ok, this is how its been described to me by a lawyer.
If you rent out your villa or apartment on a long term lease or tenancy agreement you're unaffected at this time.
If you rent out a room or rooms then you are affected.
If you rent out your villa or apartment on short term holiday lets, i.e. for a week or two, then you are affected.
It would appear that you need to obtain ID from each renter and submit this to the Polis. You also must inform the taxman but I don't know if this is meant to be every time you rent, or in your tax return - which of course you all do anyway
The actual logistics of how this is done I suspect will vary from region to region. This has been passed under the state of emergency laws and the fines (I have been told) are hefty if you don't comply.
Before anyone gets all up tight about it, this type of regulation is common in other countries. In practice, all you do is get your management company to do the checks required and this being Turkey, I'm sure it wont take them long to get geared up and offer this service.
One of the guys I work with is writing a legal article about it and when he's done I'll stick any other significant info in here.
JF
EDIT: I should have added that this information is simply what I've been told (although I have no reason to doubt its accuracy) and its up to members themselves to verify how they stand in respect of these new regulations.