The Parades Commission has placed restrictions on a republican march to be held in Strabane on Sunday.
Eugene McMenamin said the parade was peaceful in recent years
The event commemorates three IRA men shot dead by undercover soldiers of the SAS 21 years ago.
An IRA colour party attended last year's commemoration and marchers chanted pro-IRA slogans.
The SDLP assembly member for the area, Eugene McMenamin, says he "believes the determination is fair".
"It puts a lot of onus on the organisers, it's practically impossible to stop people from chanting," Mr McMenamin said.
"But I know that in recent times, in the past years, this parade has passed off peacefully and I can't see any problems come this Sunday."
The Parades Commission was set up in 1997 to make decisions on whether or not restrictions should be imposed on controversial parades in Northern Ireland
The most recent appointments, including Portadown Orangemen David Burrows and Donald McKay, were made to the commission in November 2005.