I don't know about option codes or if Nissan even uses them, but on the door jamb plate there is an 18-digit "Model" designation that includes detail about trim level and installed options if you have the chart to decode it. I have the chart (as a graphic) but I'm still not 100% sure how to read it, the last 5 digits of my model code (option detail) don't correspond directly to the chart.
Brent