Already shaping up to be one of the closest races in state history, a last-minute rule change is stirring up the recount to decide who will become Virginia’s next attorney general.

The Daily Press of Newport News, Va. reported Friday that Republican candidate Mark Obenshain had an unofficial lead of just under 1,300 votes over Democratic challenger Mark Herring. That tally did not include full provisional ballot totals, and as of Saturday, a fresh rule change was complicating matters.

According to a report by WTOP radio, the Virginia State Board Of Elections decided Friday to change rules relevant to Fairfax County, banning legal representatives from helping count votes, unless the associated voter was actually present. The board changing the rules is dominated by Republicans.

More: Republicans Just Changed the Rules AFTER a Virginia Election to Change the Outcome