DP Question

[txtrooper]

ASA Rule 4 Section 3 A, States that a DP may be used for any player provided it is made known prior to the start of the game and the player is indicated in the line-up as one of the nine in the original batting order.

Does the team Manager/Coach have to tell the PU that the DP will play defense, during the line-up card inspection, at the plate meeting? I recently worked a tournament and the UIC brought this up to me. I want to know how you all interpret this rule. I was under the impression that when the DP and FLEX were listed on the line-up that the DP was eligible to play defense, without it being said at the plate.