I don't think you need to necessarily look at the code book here. It is supposed to be attached at the back of the clip to the framing member. Not on top, if it is attached at all. You would also toenail into the bracket into the lumber. Why else would the nail holes be there. With the block there, there is no way to do it.
I would suggest you look at the Simpson web site. Here is one link for the hanger. HUTF/HUSTF Heavy Duty and Double Shear Joist Hangers