Licences for the safe staging of ski races on the Clarence River at Grafton have been granted by the Roads and Maritime Services (RMS)on Saturday and Sunday.
RMS Maritime Principal Manager North Sonia McKay said boaters should keep clear of the water of the Clarence River from Corcoran Park in Kirchner Street to about nine kilometres downstream from 8am to 5pm both days.
'This area will be used exclusively for the safe staging of water ski races organised by Big River Ski Club,' Ms McKay said.
'The area will be marked by buoys and monitored by control vessels.
'For safety reasons, skippers should avoid this area as it will be closed for the event,' Ms McKay said.
Ms McKay said vessels would not be permitted to enter the exclusive use area unless authorised by a boating safety officer or a police officer.