The website includes a section on "reporting an approach, suspicion or breaches", which says: "While you may also speak to your local union or players' association regarding an approach or suspicious activity, reporting to World Rugby as the central body is an obligation on all connected persons and is essential to ensure that all relevant information which may relate to corrupt approaches or corruption in the game is filed in one place.
"This allows World Rugby and unions to monitor reports, behaviours and potential breaches from one centralised database. For example, a 'corrupter' or gambling syndicate may operate across various countries and World Rugby needs to know about their activities globally to be able to protect participants in the game wherever they are.
"In most countries, as well as contacting World Rugby, you may also be obliged to report match-fixing or potential corruption in sport to your local police service," the website says.
NZ Rugby confirmed they informed World Rugby of the incident on Saturday.
World Rugby are unlikely to be impressed by the delay.
NZ Rugby chief executive Steve Tew, who arrived in Sydney after attending the Rio Olympics, apparently wanted to discuss the matter with his Australian rugby counterpart Bill Pulver before going to the police.
Malcolm Speed, a former chief executive of the International Cricket Committee and current executive director of the Australian Coalition of Major Professional and Participation Sports, told the Sydney Morning Herald that the delay was questionable.
"If one of the possibilities is that it's linked to betting or corruption, it's less than ideal that it wasn't reported immediately," Speed said.
"In cricket we were alert to issues like this and asked to report it to the local authorities immediately.
"From an anti-corruption perspective, it's not ideal."