Questão jurídica principal
Whether the pension fund had standing to challenge the IV disability assessment before the Federal Court.
Decisão extraída
The fund had no cognizable legal interest because the IV decision was not binding on it; it was not properly included in the IV proceedings.
Fundamentação extraída
A pension fund is bound by IV findings only if it was duly involved in the IV procedure and the assessment is not manifestly untenable. Here the denial decision was not served on the fund, and later notification of the objection decision plus joinder in the cantonal appeal did not cure that defect or create binding effect.