The group seeking to place a measure on the November ballot that would ban corporate contributions to D.C. campaigns filed suit today against the D.C. Board of Elections, seeking to reverse last week’s finding by the board that the group had fallen 1,726 signatures short of the threshold needed to get on the ballot.

After a line-by-line review of the 30,000 signatures the D.C. Public Trust submitted to the board in early July, the group said that it had found that the board had under-counted valid signatures. According to a press release, the group says it has 24,645 valid signatures and the requisite percentage needed in six of the city’s eight wards. To get a referendum or initiative on the ballot, 23,298 signatures are needed—five percent of D.C.’s registered voters—and five percent of the voters in five of the eight wards have to sign.

“Our review finds that Initiative 70 clearly qualified for the ballot, and we expect the court will agree,” said Bryan Weaver, the Ward 1 activist who filed the initiative with the Board of Elections. Weaver also said that they had identified 1,000 duly registered voters on petition sheets who were improperly disqualified by the board.

The group’s filing asks the court to expedite the review of the board’s count and place the measure—known as Initiative 70—on the November ballot.

If anyone knows anything about successfully staying on the ballot after nominating petition challenges, it’s Weaver. Last year his petitions to get on the At-Large ballot were challenged by a competitor; Weaver was almost knocked off the ballot before being able to verify enough of the signatures he had gathered to stay on.