Labour's deputy leader Grant Robertson said Parliament should consider changing the process of dealing with electoral law breaches to speed it up - including giving the Electoral Commission powers to fine or penalise for some breaches.
The Electoral Commission has referred Radio Live to the police for its show in September last year - The Prime Minister's Hour - saying it believed it was an election programme and breached the Broadcasting Act.
It took four months for the Electoral Commission to decide on the Radio Live case - and the delay meant there was no chance to remedy the situation before the election. He said he was not necessarily advocating any specific changes, but one possibility was giving the Electoral Commission more power.
Mr Robertson said the Electoral Commission was the expert body on electoral law, yet it had to send any breaches to Police to decide whether to act on them.
"The bigger issue is the number of complaints they've sent to the Police that nothing has happened with. So maybe there is another way. For instance, could you set a threshold under which the Electoral Commission was able to impose some sort of penalty rather than have to have Police prosecute it."