Okay kiddo, let me explain international rugby union eligibility rules to you!
So, imagine a big game of rugby with teams from different countries playing against each other. Each team needs players to play the game, right? But before a player can represent a country, they need to be eligible to play for that country.
To be eligible, a player needs to meet certain criteria. First of all, they need to have citizenship or be a resident in the country they want to represent. Citizenship means that they legally belong to that country and have the paperwork to prove it. Resident means they live in that country, but might not be a citizen yet.
Secondly, a player can't represent more than one country in rugby. This means that if they've already played for one country's team, they can't switch to another country's team just because they feel like it.
There's also something called a "cap", which has nothing to do with hats! In rugby, a cap is a term used to describe the number of times a player has represented their country in a game. So, once a player gets their first cap, they're officially a member of their national team and can't switch to another country's team.
But what if a player has a parent, grandparent, or great-grandparent with the citizenship of another country? In some cases, players may be eligible to play for more than one country due to their family heritage. For example, let's say Billy's mom is a citizen of Scotland, but he was born and raised in America. If Billy meets all the other eligibility criteria, he could potentially play for either the United States or Scotland's rugby team, depending on which team he wants to represent.
Overall, these eligibility rules exist to make sure that players represent their own countries fairly and that there's a sense of national pride and competition in the game. Does that make sense to you, little one?