NPR code in general uncovers various rate programs, not just one.

The two programs that it usually uncovers and that one could definitely use -- assuming they are members -- are AAA rates and Entertainment discount rates. Although, you should have a card to show that you are a member of either one, the front desk rarely asks for the former, and not that much more freuquently for the latter.

With respect to any other rate plans, it is difficult to assess without your cutting and pasting the rate rules, but generally you probably are not eligible to take advantage of this. You may be talking about various airline AA discount certs. I don't know how one gets them, but if you don't have one, you are not eligible.

Best to post the rate rules so we know what you are talking about and so better inform you.