Brigadier Mulaudzi said police wanted alleged victims to come forward to help with investigations.
This in turn means the deadline will be August for interested community groups to come forward.
Officers have renewed their appeal for four people who may have vital information to come forward.
The authority has invited organisations interested in running libraries to come forward before 8 April.
Whistle-blowers undoubtedly face significant risk and must do cost-benefit analysis to decide whether to come forward.
"We're not sure whether he's hurt, injured or unable to come forward, " said his father.
Audrie's father Lawrence Pott pleaded with witnesses to come forward at a San Jose news conference.
Assistant Chief Constable Marcus Beale urged anyone who knew of people being "radicalised" to come forward.
Police have appealed for anyone who filmed or took photographs of the race to come forward.
Sharon Clark appealed to the driver who fled the scene of the crash to come forward.
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Four Scottish councils pooled their resources last month to encourage potential carers to come forward.
Ch Supt Irvine condemned those behind the attack, and appealed for any witnesses to come forward.
Dr Bauld said that teenagers were reluctant to come forward for help in giving up smoking.
The two women told French press that the Strauss-Kahn case had inspired them to come forward.
It was Ferguson's comments in the American Spectator that had prompted Jones to come forward.
Det Ch Insp Dave Pester, from Greater Manchester Police, appealed for witnesses to come forward.
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Officers have urged people who saw anyone matching these descriptions in the area to come forward.
His parents Alan Vaughan and Mary Lucas believe witnesses were "too scared to come forward".
There would be no shortage of victims willing to come forward to talk about those.
To encourage victims to come forward it has assigned a team of specially-trained liaison officers.
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He has implored victims to come forward and promises support for them if they do.
Police want anyone who saw the vehicle on that road on 30 December to come forward.
North Wales Police are investigating the incident and are looking for witnesses to come forward.
Instead, it wants banks to come forward with ideas for making current accounts more transparent.
Detectives investigating Lindsey's death are still appealing for passengers on the tram to come forward.
Police are now reviewing videotape footage and calling on any witnesses to come forward.
Parties privy to corrupt schemes such as consultants, money managers, or custodians are unlikely to come forward.
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Margaret Leek, chairwoman at Ipswich Harriers, said the three victims had been "very brave" to come forward.
Police have appealed for witnesses and anyone who may have information about the man to come forward.
Detectives are now urging anyone who witnessed the attack to come forward, particularly the passer-by who helped.
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