My understanding (subject to my misinterpretation and/or misreading of the provided info). 15 HP is not a limit. That is the cut-off, so to speak, for the requirement of a CA boating card if you're 45 or under or 50 or under after Jan. 1st. Perris has nothing to do with the boating card, it's a new state scam...ah, requirement for anyone running a boat anywhere in CA. If you are older than those ages no boating card is required or if your boat has an engine smaller than 15 HP (like say an 8 HP) no boating card is required. If your boat has a 150 HP engine I assume you can use it subject to speed restrictions, I'm sure. As for the drawing you are entered for all 14 Wednesdays if you put in an application. You could draw any Wednesday or none or multiple Wednesdays. If you draw and can't go that particular Wednesday you don't pay the fees after 30 days (Sept. 5th) then the next person drawn is offered the spot. Some of the other stuff seems random but might make sense if you think about it. Like the 40-round limit, they probably don't want people putting back and forth to and from the launch ramp during hunting hours to get more shells like might happen with a 25-shell limit like SJ and other Wildlife Areas have...(maybe?). The dozen decoy limit is probably because they want the boats off the water by 1:00 PM after the 12 noon quitting time. If you have 60 decoys out you might not make it out of there by 1:00...(maybe?). Of course, as I said, this is just my understanding. If you have specific questions I'd get ahold of whoever is running the hunting program there and get it from the horse's mouth.