[en] It is shown that dual model given by Dorren, Rittenberg and Yaffe, similar to the dual Pokorski-Satz model, leads to the Gribov-Morrison rule for the parent states. In the Pokorski-Satz model this parity rule does not apply to the daughters. In the model considered by us the first daughter under Nsub(γ)-trajectory satisfies the Gribov-Morrison rule. (author)