The general elections shall be held biennially, on the first Monday of September; but the General Assembly may by law fix a different time.
See. 9. In trials of contested elections and in proceedings for the investigation of elections no person shall be permitted to withhold his testimony on the ground that it may criminate himself or subject him to public infamy; but such testimony shall not be used against him in any judicial proceeding, except for perjury in giving such testimony.