What frisbees can be thrown over the feeder station walls in the last 30 seconds?

[Team23pitboss]

G35:
"DISCS may be fed onto the FIELD only under the following circumstances:
A. during TELEOP through the FEEDER SLOTS for any DISCS and
B. during the last thirty (30) seconds of TELEOP over the FEEDER STATIONS for Red and Blue DISCS."

Is this saying that only colored disks can be thrown over the feeder station walls in the last 30 seconds of the match or am I merely misreading the rules? If my interpretation is correct then teams that are unaware of this rule could be incurring fouls for every white disk they throw at the end of the round! There does not appear to be a Q&A about this, and I would be interested to hear how judges have been handling this at week 0 events.