On Ranke's proposal--or rather order--CIAP's Board was summoned to meet in September 1962, at the founding congress of his International Society for Folk Narrative Research (ISFNR).
The folklorists at the ISFNR congress were invited to join the CIAP meeting and to vote!
The reason Ranke chose to convene in Athens was that he would arrange his ISFNR congress there in September.
Non-members Ranke and Wildhaber were most active in the debate, and once again all the ISFNR folklorists were allowed to vote.
He already controlled the journal Fabula, the Enzyklopadie des Marchens, and the ISFNR. Why this appetite for CIAP also?
A strong CIAP might turn out a rival to his ISFNR, but a weak CIAP would do no harm.