Wallabies and NSW winger Wendell Sailor has requested the "B" sample of his drugs test be analysed by the Australian Sports Anti-Doping Authority.

A statement from the Australian Rugby Union said Sailor had informed the governing body of the decision, which had a deadline of 6pm on Monday.

"Wendell Sailor has informed the Australian Rugby Union that he has formally requested the Australian Sports Anti-Doping Authority (ASADA) to test his B sample," the statement said.

"ASADA has informed the ARU that the testing procedure will take place as soon as possible, and that the test results are likely to be available next week."

The Sailor camp is treating his case as a private matter and made no comment.

Sailor tested positive to a banned substance, reportedly cocaine, on April 16 and was stood down by the Waratahs on May 12, missing two crucial Super 14 matches against the Hurricanes on May 13 and on Friday when his team lost its semi-final in Wellington.

Drug testers take two samples at the same time from players, testing the "A" portion and storing the "B" sample.

If Sailor's "B" sample tests negative he will be exonerated.

But a positive "B" sample will mean him fronting an independent tribunal and facing a ban of up to two years.

"If he was wanting to have the "B" sample tested he could nominate either himself or a representative to be present when the bottle's opened and then it's tested by the lab," ASADA spokesman Simon Tidy told AAP on Monday.

"If it comes back a positive confirmed case, then they've (players) got a period of time (seven days) to make a submission to us to say, look, I'm not happy with this, I'm not happy with that.

"At the end of that time if everything's all exhausted we then officially notify the sport and the athlete of an anti-doping rule violation."

Tidy said the make-up of the tribunal was a matter for the sport involved but discussions were still taking place between the ARU and ASADA.

"That's something for the sport, they might use the CAS (the Court of Arbitration for Sport) tribunal process or they may have their own depending on the sport and we're usually a party to that."

Tidy said police involvement in the Sailor case, if his positive test is confirmed, would be unlikely.

"If it's a criminal matter then obviously we'd probably look at that, but I'd say that's speculation at this stage," he said.

"It's not something that we would passing on, I would say."

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