Asada has turned its investigation from NRL clubs to players, with 31 individuals to be issued notices this week that they are required to be interviewed by the anti-doping body.
In a significant development in the drugs scandal, NRL chief executive Dave Smith yesterday said clubs were no longer the subject of investigations regarding systematic doping, outside of the probe into practices at Cronulla in 2011.
The investigation process is to take four to six weeks, after which the Australian Sports Anti-Doping Authority will inform the NRL whether any infraction notices need to be issued.
"Asada has informed the NRL that aside from some well-documented concerns at Cronulla, its clear focus is now on whether individuals - or groups of individuals - may have acted outside of club programmes," Smith said. "This is not about clubs.
"The fact that Asada will issue notices of interview does not mean players or officials are being charged.