HENRY - Cany you please clarify something for me?

I have read through the rules and am listing now and each day by adjusting the number of days listed for the correct categories etc, and I understand all of that. What I would like to know and can't find in the rules is can I specify in the tile or the listing that the item(s) are eligible for the competition (for potential bidders)?

Am holding fire on the rest of my listings until I get an answer, but please make it as soon as poss as they need to fall within the correct time frame. Thanks!:-)