Direct answer
Dress to Impress DLC codes should be treated as product-linked rewards and should not be mixed into the free active codes list.
DLC code boundary
Dress to Impress DLC codes can come from official product or merchandise flows. Because these are not the same as free public DTI codes, they need a DLC Only status, official shop source, reward description, and clear caveat that availability depends on the product rules.
What to record
Each Dress to Impress DLC codes record should include the product name, code format if publicly documented, reward, redemption location, region or product limitation, support link, source URL, and last verified date. Never publish private codes or encourage players to buy unofficial resale codes.