"It's all speculation [what might happen]. We have obviously got the Anzac test and World Cup coming up and we want to make sure everything is above board."
The NZRL's World Cup planning is well advanced and they recently held a camp with an extended squad in Sydney.
All six clubs mentioned in the commission report are due to meet with the Australian Sports Anti-Doping Authority (ASADA) later today but the authority said in a statement they wouldn't name specific players under investigation.
"This briefing will not name players, but rather describe to clubs the investigation process ASADA will follow," the statement said.
Former Manly sports scientist Stephen Dank has come under considerable scrutiny because of his involvement with NRL and AFL club at the centre of the investigation and admitted providing coaches at Australian Rules club Essendon with banned drugs but denied any were given to players. Some coaches reportedly take drugs to see what effect, if any, they might have.
"Look, to be perfectly honest, there were a couple of coaches that were using some supplements, if you like, that were a little bit outside the World Anti-Doping Authority code," Dank told ABC television's 7.30 programme. "But again they were entitled to it. There's certainly nothing illegal there."
Dank, who was interviewed by the commission in September, also insisted he had never given a banned substance to any players at NRL clubs he'd been involved with, including Manly and Cronulla, but admitted some Manly players were injected with calf blood during his time there to help them recover faster from injuries.
Newcastle coach Wayne Bennett said auditors from Deloitte visited the club last week and checked records as far back as 2005 but didn't think the current setup had anything to worry about.
"They want us to confess to something," Bennett told reporters. "I'm racking my head what we've got to confess to. I've been through the staff, I've checked with all the players.
"Whatever they're looking for, it hasn't happened in the past 18 months. So after that I've got no idea."
- additional reporting AAP