The Parades Commission will be reappointed in January if local politicians fail to reach agreement on controversial marches, the Secretary of State has said.
Owen Paterson told a committee of MPs that a power vacuum forcing police to decide the route of some parades would be unacceptable.
Dozens of police officers were injured during three nights of rioting in north Belfast in July following a contentious Loyal Order parade through the area.
This summer the Orange Order rejected draft parades legislation and refused to take part in a consultation process.
But Mr Paterson warned the clock was ticking for local politicians to make up their minds.
"If they don't we will have to set in train actions which will reappoint a Parades Commission by January next year," he said.
The draft Public Assemblies, Parades and Protests Bill has already been consulted on and is due to go through the Northern Ireland Assembly this autumn.
It was drawn up following the report of the working group on parades set up following agreement on the devolution of policing and justice at Hillsborough.
Mr Paterson said he regretted the violence in Ardoyne which left 80 police injured in battles with suspected dissident republicans.
One policewoman had a piece of masonry dropped on her head.
But the Secretary of State added: "Most parades went off peacefully."
"Those organising must remember that there is this tiny (violent) number. Is it really worth it for those small number of parades to have that whole image of parading distorted on world television?"
"I think the Parades Commission has done a good job, it took away the difficulty of embroiling the police in difficult decisions on routing, they have resolved the vast majority of contentious parades."
"It is absolutely not an option to leave a hole."
Upper Bann Democratic DUP MP David Simpson said he was concerned by the prospect of a reconstituted commission and said it had been a "fundamental disaster".
© Press Association