[A26B]

David,
I do not think revisions to the bylaws are necessary to create a membership option for paying dues,i.e. a one time,ump sum payment for dues that would last for a members lifetime. NOTE: I did not use the term "Lifetime Member," simply because there is already a "Lifetime Member" in the bylaws. The "Lifetime Member" in the bylaws is a bestowment to a Registry member who has excelled in service to the registry over a long period of time and is recognized by the Registry. (refer to the bylaws)
Instead, for the dues option referred to, I would suggest something along the line of "Perpetual Membership" or similar term.
Such a membership option could be initiated or withdrawn if it proved impractical to continue (those who opted in would of course remain as such). Memberships of the proposed type would be no more or less than "Regular Members" in accordance with the bylaws.
Done on my IPhone so please excuse errors)