Premiership and Championship rugby sides have been given permission to return to non-contact training.
The Professional Game Board (PGB) confirmed on Tuesday that teams are now allowed to hold individual conditioning sessions provided social distancing measures are maintained.
The top flight in England was suspended in March due to the coronavirus pandemic, but it is hoped the season can be resumed, despite all levels from the Championship and below seeing their campaigns cancelled.
"The clubs will need to satisfy a number of requirements to start Stage 1 as we continue the huge amount of work being undertaken to enable a safe return to training," Chris Booy, PGB Chair, said in a statement.
"The welfare of the players, management and staff is our only priority, and we look forward to the season resuming when it is safe to do so."
Premiership clubs have also given unanimous backing to an overhaul of salary-cap regulations.
A review led by Lord Myners put forward 52 recommendations last month as part of a comprehensive assessment of the cap rules.
Although neither the level of the salary cap nor the issue around marquee player allowances have yet been addressed, all 52 recommendations put forward have won the support of clubs.
The suggested changes include increasing the severity of sporting sanctions on clubs in breach of the rules to include relegation, suspension, stripping of titles and the return of prize money.
The review followed the decision to relegate reigning champions Saracens at the end of 2019-20 due to repeated breaches of the salary cap.