When the user navigates to promo description screen (if the promo is not having any promoText), from makeAutoDescription method of ProductPromoWorker, the description is prepared and shown on UI.
As per current code implementation, we are not having the support of which party classification condition is included in the Promo description.
Steps to verify,
1.) Create a Promo with condition on Party Classification (for this you need to create the party classification group)
2.) Assign any demo customer to this group
3.) Create a sales order (from Order Entry or E-Commerce) and apply the promo code.
4.) Now as the Promo is applied, it showed on cart screen, select 'details' option in front of the promo code.
5.) The promo detail screen will be shown (now the description shown of Promo in incorrect, since there is not support of party classification condition in the auto-generated promo description)