The government oversight body also criticised police over the lack of privacy they provided people being made to undress,and dismissed notions that the belief that many festival patrons concealing drugs in internal cavities amounted to enough reasonable suspicion to search.
Officers'reliance upon festivalgoers becoming nervous when confronted by police and sniffer dogs was equally problematic,the commission found.
The commission released five reports into allegations of illegal strip searches on Friday,finding all of them had been undertaken unlawfully and none of them resulted in finding prohibited drugs.
"In each report the commission has found that the involved police lacked the appropriate understanding of the legal requirements regarding the conduct of strip searches and had not received adequate training,"it said in a statement.
The commission said it was satisfied NSW Police had undertaken measures to address its concerns. The force has instituted many changes affecting the way its officers conduct strip searches,including the creation of a personal search manual,two brochures,improved procedures for recording information,and the development of mandatory training.
A NSW Police spokesperson said the force would consider the recommendations and findings made by the commission."The NSW Police force is committed to continuous improvement and has developed initiatives to standardise operational orders and enhance compliance,"the spokesperson said.