Understanding Society User Support

Am I correct in perceiving (from the "Content Plan" document) that the citizen question (CITZN) will be asked only once (first wave or upon panel entry)?

I hope the answer is no, at least for those respondents who indicate on first answer that they are not UK citizens. Citizenship is not a "stable characteristic" -- certainly not for immigrants. My research depends on being able to know when a panel member has become a naturalized UK citizen.

thank you,
David Bartram