70 Gold Duster - Question

I thought a V8Y was a yellow bumble bee stripe...at least in '69 it was. No idea on the Y23. Never seen that code before. No vinyl top codes on there that I can see. It's interesting that the Y23, V6Y, and V8Y codes didn't have any charge attached to them. Maybe with the Gold Duster option listed up top with it's stripe options, it superceded the ones down below?