Code confusion

I live in Ontario Canada and have run into a problem regarding the attachment of wood framing to concrete.
I intend to attach a hand rail post to the concrete deck with a Simpson fitting!
As the project is being done, under the scrutiny of a building inspector, I solicited his advice, as to what would be acceptable for this purpose!
I have been informed that OBC doesn't address the attachment of wood to concrete, so I must have it engineered.
Now it seems to me, that if the law does not address a subject specifically, that I am free to install it as I see fit.
My question being, if the 'code' doesn't mention what must be followed, why does it mean that it must automatically be engineered!