Residents in Glaslough are supporting judicial review proceedings being brought against An Bord Pleanala.
The move is over the planning authority's decision to grant permission for the erection of a 20m telecommunications mast in the award-winning village.
Proceedings were initiated by Antonia Leslie who lodged the application last week.
Meanwhile, residents in the north Monaghan village held an "emergency meeting" last month to address the matter.
The mast was labelled a "monstrosity".
The community made it clear at the time, that any legal route made available to them to appeal the decision, would be taken.