Originally Posted by maritimesailor
...whoever it is out there who thinks you can back up to the line when called over early, you have NO rights when doing so...

Ok, I reread this, and it you are technically correct - but because of rule 21.1, not 21.3. The boat is returning to the pre-start side of the line after the starting signal and it doesn't matter whether she's moving forward or backing up.

Regards,
Eric