Apparently we can register as a liberal to vote in the upcoming leadership race. What does it mean if I register? What do I gain (besides the aforementioned voting) and does it place any kind of restrictions on me (e.g. am I prevented from doing the same with a different party)?
They have rules (PDF) posted on their site. You’re not allowed to be a registered member for another party. You also have to follow the rules of their constitution (PDF) which says you can be kicked out for not supporting the party.