"Although these [cancellation] measures are not explicitly required by Government, these measures will help to minimise the risk of person to person transmission," said Belsham.
"With the advice that this pandemic will last far longer than weeks, we will review the proposed start date of rugby and provide on-going advice on that in due course also.
"As previously advised, the Health and Wellbeing of our community is our number one priority, therefore any decisions that get made needs to keep this in mind."
Previously, clubs were allowed to continue their team and group training sessions under a "non-contact" format, where they should follow "sensible hygiene protocols".
Contact training would have been allowed to resume on April 13, five days before the new kickoff for Premier rugby.
Senior rugby is still scheduled to kickoff on April 25.