Former Manitoba Keewatinowi Okimakanak (MKO) grand chief David Harper says the election that saw him unseated by Sheila North Wilson in Sept. 2, 2015 should be nullified.

Harper has concerns about the "conduct" of the election, states his lawyer Charles Huband in a letter dated Nov. 4, 2015 and addressed to Kelvina Lynxleg, MKO executive director.

Sheila North Wilson

Sheila North Wilson became the first female grand chief of Manitoba Keewatinowi Okimakanak Sept. 2, 2015. (Sheila North Wilson)

"We are of the opinion that the results of the September 2015 election are invalid because certain First Nations' members were permitted to vote," the letter continues, "even though those First Nations had forfeited their memberships in MKO."

These memberships had not "properly resumed" their member status at the time of the vote and should not have been allowed to participate in the election, Harper and his lawyer allege.

Harper is asking MKO to discard the results of the 2015 election and hold a new vote for grand chief.

"It is important to note that Mr. Harper accepts his defeat," Harper's lawyer writes, "and does not intend to run for the position of grand chief again if another election is held."

If the results of the election are not overturned, Harper's lawyer states the "integrity" and "validity" of MKO will be threatened.

CBC has requested to speak with David Harper and Grand Chief Sheila North Wilson.