Where an infringement of Section 11 (10) (a) of the International Laws of the Game is committed by the defending team, the referee will recommence the tackle count by verbally and physically signalling “6 again”, except for the following instances:
• Professional Fouls
• Repeated Infringements
• Where play has broken down (eg the
infringement by the defending team results in a lost ball or an unacceptable PTB necessitating a stoppage)
A full penalty will be awarded in the above instances.
Where a referee awards a full penalty for a professional foul or repeated infringements, the offending player will be sent to the sin bin.
https://www.playrugbyleague.com/media/10100/nrl-international-rules-book-2020-a5-v2-web.pdf