2Any application by a prosecutor or by the accused in terms of section 100 of this Act for a jury of men only, or of women only, must be made at the first (pleading) diet immediately after the recording of a plea or pleas of " not guilty " (or where no plea is taken because of preliminary objections held by the sheriff not to be frivolous, then immediately after such objections have been certified by the sheriff under section 105 of this Act or otherwise disposed of by him). An entry recording the making of the application shall be entered on the record copy of the indictment, and signed by the presiding sheriff.