The contestant shall file his complaint in the clerk’s office of the circuit court within 30 days following the date of the election in the case of a general election, and within 10 days following the date of the election in case of a primary election or special election held on a date other than that of a general election. A copy of the complaint shall be served by the contestant as provided under § 8.01-296 on each contestee; otherwise the complaint shall not be valid. For a contest conducted pursuant to § 24.2-806, the copy of the complaint shall be served by the contestant on each contestee within 30 days following the date of the election in the case of a general election and within 10 days following the date of the election in the case of a primary or special election held on a date other than that of a general election. No enlargement or amendment of the complaint, except as to form, shall be permitted save by leave of court as provided in Rule 1:8 of the Rules of Supreme Court of Virginia.