8 GCA § 65.25: When Discovery May be Requested.

(a) At the arraignment or as soon thereafter as is practicable the government may give notice to the defendant of its intention to use specified evidence at trial in order to afford the defendant an opportunity to raise objections to such evidence prior to trial under § 65.15.

(b) At the arraignment or as soon thereafter as is practicable the defendant may, in order to be afforded an opportunity to move to suppress evidence under § 65.15 request notice of the government's intention to use (in its evidence in chief at trial) any evidence which the defendant may be entitled to discover under Chapter 70 (commencing with § 70.10).