imagine that,nobody seems to know what a "ledger board" or a "rim joist" is! :-)

I think we know what they are. It just isn't clear what you are asking! Are you asking whether building codes in your area allow for the use of lag bolts?

As Dennis said, your post didn't seem to really be asking a question.

But since you want a response, I'll ask some questions.
I guess new construction has to have "carriage bolts" in a certain pattern but of course that's impossible with a house that's already built.
Why do you think that's impossible? Do you just mean more difficult?
maybe lag screws
Maybe. Have you asked your permitting office what is required?

Are you wanting to bring your deck up to code or just make it better than it currently is?

I'm looking at the picture you posted and I'm wondering why you posted it. How is that supposed to help? A close up of painted wood?!? :)

The main reason for deck failure is the deck coming away from the house. Lag bolts may help but without knowing the structure, you cant be sure.

The best way to do it is some sort of Lateral bracing. Simpson has a bracket for this but you need to be able to get at the inside of the house structure. If you want to be safe, this is the way to go.

Here is a link that might be useful: Simpson lateral support.

it is true that the current codes call for some latteral bracing the does for the most part requre getting to the floor joist on the inside. However, it is highly likely that your house was built with a solid rim joist on top of the sill plate and the adding of Ledger Loks through your deck ledger into the house rim will do a tremendous amount to keeping your deck attached to your house.