The Board of An Coimisiún Toghcháin has rejected an appeal which would have led to the name of the founder of the right-wing National Party Justin Barrett being removed as an authorised officer of the party.
It has upheld an earlier ruling by the Registrar of Political Parties against a case brought by James Reynolds.
A statement said: "The Board was not satisfied that reasonable notice was given of the relevant meeting of the party's National Directorate, and that the resolutions made at that meeting were therefore not validly made."
The Electoral Commission ruling also disclosed that a "meeting" to remove Mr Barrett as party leader was attended by only one person, the party's deputy leader James Reynolds.
The decision means that no change will be made to the Register of Political Parties, both Justin Barrett and James Reynolds will remain as the authorised officers of the National Party.
Two rival factions of the National Party have been battling over the right to use the party name.
Last year, a group supportive of Mr Reynolds claimed that Mr Barrett had been removed from his position of party leader, a claim Mr Barrett vehemently rejected.
The row triggered a garda investigation after Mr Barrett claimed that a large amount of gold reserves had been stolen from the party's vaults.
Gardaí subsequently located the gold bars, estimated to be worth around €400,000, which were deemed to be in a secure location and could only be accessed appropriately.
