For stag derbies, untampered spurs are required during stag screening; besides that of primary wing feathers are intact, wing band is untampered, and stag registration sheet is legitimate. You have to screen your own opponent. It is your right and responsibility. Do not trust anyone even the organizers. Tell your opponent to screen your stag too. Do not complain after the fight that your stag fought a cock.
Also check out his spurs when he was younger, click link: