Not exactly, Ted. When the member renews they have the option of nominating a family member (without any extra subscription). There is a line in the renewal form for this purpose. The family member has to sign to “agree to abide by the objects and rules….. etc”, and can vote at AGM, so there needs to be some formaility.
I can include a family member mid-term, just fill the form in, and send it to me.