So I found the legistlation in another thread and read through the beginning parts, and the way I read it, only the person in physical control of the boat would fall under the legislation. Everyone else in the boat can be tanked if they so desire, as long as they don't physically control the boat (I'm coming from the perspective of my boat, an oar rig 14 raft). As soon as you put a paddle in your hand, you're considered "physically in control" I would assume. At that point, if an "officer" has reason to believe you're in violation, then you can be ticketed for BUI and asked to take a breathylizer. And if you're dead, they force you to take one. LOL
So back to my original question, it seems the law is slightly different than I thought it was for boats originally, and different than for cars. In a car, you're not allowed to have an open container (unless I am wrong on that too, which is certainly possible!), which is what I thought the original boat law was.
The good news, in relation to my original question, is that it seems as though as long as the person in conrtrol of the boat is also in control of his/her alcohol, the officers will probably not have cause to ticket you. Being resonable and having commons sense once again prevails.
And that means the legislation regarding making sure the captain has what he needs is still in effect, so passengers, make sure you keep said captain adequately hydrated! Pass me another beer please!