Government ministers will be checking themselves this morning.
It comes as Stuart Nash has been dismissed from Cabinet.
It's emerged the Napier MP emailed donors about private cabinet information around a 2020 rent relief package.
Political Editor Jason Walls told Kate Hawkesby there will be a few ministers who will be wondering whether they've accidentally breached the Cabinet manual.
He says Prime Minister Chris Hipkins has, on a number of occasions, reinforced the importance of ensuring they're on the right side of the manual.
LISTEN ABOVE

Kevin Putt: Former Springbok previews the final Greatest Rivalry test between the All Blacks and Springboks
02:18

Leon Panetta: Former Defence Secretary and CIA Director on the US-Iran war
08:17

Graeme Edgeler: Constitutional law expert on an MSD review which found more than 30-thousand cases, where benefits and payments were wrongly suspended
04:04