Prime Minister Scott Morrison has introduced new laws for citizenship ceremonies including requiring a dress code for New Australians attending their citizenship ceremony.

Local councils will be forced to hold the event on Australia Day, rather than opting for alternative dates.

The dress code will ban new citizens from wearing thongs and boardies to their ceremony.

Morrison doubled down on his stance in an interview with the today show, saying, “this is a very important institution, citizenship. You wouldn’t turn up to your kid’s graduation or something like that dressed like that.”