Winston Peters says a move to allow Sikhs to carry their ceremonial dagger would be unfair to others - including Maori who want to carry a taiaha.
National list MP Kanwaljit Singh Bakshi has a private member's bill in the ballot to allow a baptised Sikh person to carry a kirpan in public places and workplaces, without this being an offence.
And Prime Minister Bill English told a gathering in Auckland a week ago the Government, if re-elected, will change the law to allow the kirpan to be carried, according to the Politik website.
Former Prime Minister John Key in 2015 said the Government was considering exempting kirpans from civil aviation rules, to allow them to be carried onboard and not stowed with luggage.
Those comments came after seven Sikh cricket fans were barred from watching a Cricket World Cup match at Eden Park because they were wearing kirpans.