State Services Commission Iain Rennie says it would inappropriate under the rules for the state sector if TVNZ required its staff to disclose their political affiliations.
Mr Rennie has issued a statement saying he was concerned about a proposal by TVNZ's bosses to tighten its code of conduct so that staff had to disclose political affiliations, such as membership of a political party.
"It would not be appropriate for any organisation in the State Services to monitor or keep a register of their staff's political views or affiliations."
The proposal was made as a result of the recent resignation of Shane Taurima, the head of TVNZ's Maori and Pacific unit. That resignation followed revelations Mr Taurima was considering standing for Labour at the election and had attended Labour Party meetings, including one held at TVNZ.
TVNZ is now investigating that and at a select committee yesterday its CEO Kevin Kenrick raised the possibility of requiring staff to declare their allegiances to allow better management of potential conflicts of interest.