There are now two separate systems.

2YO Maiden System #1
Rule 1: Operate only on 2YO maiden events.
Rule 2: Consider only colts that finished 2nd in its last start.
Rule 3: Last-start SP <=$8.50.
Rule 4: If more than one qualifier, pass the race.
Rule 5: Ten or more runners in its last start.

2YO Maiden System #2
Rule 1: Operate only on 2YO maiden events.
Rule 2: Consider only colts that finished 2nd in its last start.
Rule 3: Last-start SP <=$8.50.
Rule 4: If more than one qualifier, pass the race.
Rule 5: Pre-post price <$3.