McElvaney quit FG after four decades
Hugh McElvaney received a standing ovation at a meeting of anti-pylon protesters last month when he announced his resignation from Fine Gael.
He told them the party had backtracked on its policy on the issue and he was not going to be a hypocrite.
His departure was a massive shock locally.
Mr McElvaney had often described himself as "a dyed-in- the-wool Fine Gael man".
In recent days he has said that it was only "a coincidence" that his resignation from the party came shortly after he was confronted by RTÉ after being recorded seeking a Stg£10,000 payment to assist with a planning matter.
Mr McElvaney, who turns 66 later this month, had been a mainstay of Fine Gael's operation in Monaghan for four decades, having first been elected to the county council in 1974.
The Stranooden-based councillor has a number of business interests outside politics.
His ethics register filing from last February omitted to mention a pub that he owns and a plot of agricultural land. However, he did record his directorship of Exomex Ltd, the company that owns McElvaney's Waste and Recycling. Mr McElvaney has a half share in the firm, which provides household waste disposal services.
The councillor had a previous brush with controversy in 1996 when he apologised over "an incident" on an Aer Lingus flight to Boston.
It was reported at the time that he was abusive to staff and upset passengers after he was refused a drink.