World Rugby vice-chairman Agustin Pichot is to look into the sport's international eligibility rules as part of a wide-ranging report into the sustainability of the game in the Pacific island nations.
The former Argentina international came out strongly against the existing rules, which allow a player to represent a country if they have lived there for three years, when he was nominated to his post last month.
Admitting his views would be controversial, the 41-year-old former Pumas captain and rugby Hall of Famer said he thought the period was too short.
"There are special cases where players moved when they were ten or twelve years old," he said.
"But just moving to a country, being taken from an Academy, like they are doing in Tonga, and put into play, say, in an Ireland shirt, I'm against it. I think it is not right."