Condition PR - Only applies to applications recieved on or after Oct 2012. (Yes I forget the exact day.)
- if you have kids you're exempt
- if you were married more than two years BEFORE filing, you are exempt
- there was a line about being together four years or more before filing also being exempt, but that seems to have poofed. Not sure if this is true or not.
So if you're married under two years without children, you must remain in a real relationship (i. e., living together, regular "adult" contact, etc) for a minimum of two years after landing.