There are two levels of 29er class membership: national and international.
Until early 2017, Canadian, US, and international dues were collected by the International 29er Class Association at one online portal. That system no longer exists; each country collects its own dues and each sailor wishing to be a member of the International 29er Class must pay them on their own using a new International dues payment portal.
Each country has it's own requirements for its own country class dues.
Those wishing to join the Canadian 29er Class Association should contact its President - Kevin Frost at email@example.com
Those wishing to join the US 29er Class Association should contact its President - John Papadopoulos at firstname.lastname@example.org
International membership is only required for international events, which includes the 29er World Championships, continental (e.g. North American) championships, and World Sailing's Youth World Sailing Championships.