The Parades Commission in the North has placed some restrictions on a parade by junior Orangemen in Portadown tomorrow afternoon.
There was trouble following the same march last year when over 60 police officers were injured during rioting involving protestors on the nationalist Garvaghy Road.
Nationalist residents have voiced their opposition to tomorrow's parade and Sinn Fein has called on the Commission to rethink its decision to allow the march to go ahead.
Upper Bann Assembly member, Dr Dara O'Hagan, said the march would undoubtedly lead to a large security force operation, which she said had provoked violent confrontation in the past with the local community.
Dr O'Hagan said there had been no attempt at dialogue with local residents and the march would only serve to raise tensions during the marching season.
The Commission has ruled that the return parade by the Orangemen cannot proceed beyond the junction of Park Road and Garvaghy Road any later than 5.30pm and that the parade must disperse by 6.00pm.
Only the junior orangemen and their accompanying family members are allowed to be present on the lower part of the Garvaghy Road between Park Road and Castle Avenue during the afternoon parade.
PSNI Assistant Chief Constable Stephen White said he hoped if there was any protest it would be peaceful.
He said he hoped the police would not have to resort to defensive measures and that they would not have to fire plastic bullets as they had last year.
He appealed to parents and community workers to ensure there was calm and said they had a responsibility to ensure people were law-abiding and recognised the democratic decision by the Parades Commission.
