The channel is in use by fairly large freight-vessels and in a deal with the provence, we have agreed to keep sailors out as much as possible.
Yesterday we had a discussion when this rule in the Sailing Instructions comes into effect. Because it is speccifically stated that this rule applies during racing, it has no effect before the preparatory (four minute) signal. Only the rules in part 2 - the right-of-way rules have effect before this signal
This turned out to be a problem on Sunday afternoon, when the course chosen by the PRO started next to the channel. He should perhaps have taken a little more distance, but the sailors started waiting before there scheduled start, smack in the middle of the channel.
We cannot enforce the provincial regulation, stating that you have to have a stanby-engine ready when entering the channel. Or when you don't have a motor, you only may cross via the shortest possible route.
I'm currently looking for a way to extend the time that they are not allowed to enter the "forbidden" area, within the jurisdiction of the RRS.