The demurrer must be in writing, signed either by the defendant or his counsel, and filed. It must distinctly specify the grounds of objection to the indictment, or it must be disregarded.
Idaho Code § 19-1704
Form of demurrer
Current official text: Idaho Statutes (Idaho Legislature). Digitized from the UniCourt Code Improvement Commission public-domain capture. Reproduced from public-domain Idaho statutes; confirm against the official source for the current text. Not legal advice.