A very common rule (never gets old).
The submissive shall take a photo of ALL her panties and shall forward such images to the Dominant as directed (WhatsApp, Email, Dropbox etc.), for the Dominant’s safekeeping.

By 8 a.m. each day, the Dominant shall select which pair is to be worn by the submissive that day. If no selection is communicated, no panties shall be worn.

By 9 a.m. each day, the submissive shall provide evidence of her compliance by taking a photo of herself wearing the selected panties (including the days where no selection is made).