Yes, a 1974 list and residence from 1967 is certain proof of her citizenship in 1970. Oh...wait...no it isn't.
The list was compiled in the early seventies and *published* in ‘74. And it must scare the Cruz camp witless, because they deny Eleanor was EVER a Canadian citizen.
If your version of the story is true, Ted would have unsealed his consular file. That would have answered all questions officially, and put the matter to rest.
But Cruz has not and will never unseal his consular file. It doesn’t validate his story one iota.