Ch 23 International Building Code. It will based upon Panel Grade, not panel construction. The only difference that I am aware of with OSB is the strength axis is the axis parallel to the OSB face strands, usually the long dimension of the panel unless otherwise indicated.
to add to the above, you can specifically drill down OSB values in the 2005 Manual for engineered wood construction, chapter 9... and in the 2001 NDS supplements.
