Dedication by an (ephebic) Competition-director, 26/5 BC ?

IG II3 4 393 Date: 26/5 BC?
. . . having been Competition-director (agōnothetēsas) in the year that Diotimos of Halai was archon (26/5 BC?),[1] (dedicated this) to Apollo, in the (5) trainership (paidotribountos) of Philios son of Philios of Phrearrhioi [the younger],[2] in the assistant-trainership (hupopaidotribountos) of Apollonides son of Philios of Phrearrhioi.[3]