Jarryd Hayne will be able to turn out for Fiji at this weekend's final leg of the World Rugby Sevens Series in London after being cleared by the governing body.
"World Rugby notes the announcement that Jarryd Hayne wishes to pursue new sporting challenges with the Fiji Rugby Sevens team and has moved to address speculation regarding the player’s availability under Regulation 21 to play Sevens," a statement read on Monday.
"World Rugby is committed to the highest-possible anti-doping standards. The WADA-compliant World Rugby Regulation 21 mirrors the requirements of the World Anti-Doping Code and the WADA International Standard for Testing and Investigations.
"It does not require a player to be included in a testing pool for a defined period of time prior to selection if they are being selected for international competition for the first time. This position is entirely consistent with World Rugby’s approach to other cross-over athletes, including other ex-NFL athletes coming into rugby.
"Therefore, Hayne would be eligible for the London round of the World Rugby Sevens Series subject to all other regulatory and registration matters being met.
"He would also be immediately included in World Rugby’s pre-Rio 2016 risk-based testing programme, which since January 2016 has included a comprehensive programme of targeted in and out of competition blood and urine testing on players likely to compete in Rio.
"The pre-Games programme also includes regular additional screening for substances such as ESAs and human growth hormone, and both steroidal and haematological athlete biological profiling."
Hayne announced on Sunday that he was retiring from the NFL, where he spent last year playing as a running back and punt returner for the San Francisco 49ers, in order to take up an offer from Fiji to join their squad ahead of Olympics.