Therefore, where industry or trade associations claim both to be charitable institutions as well as mutual organizations and their activities are restricted to contributions from and participation of only their members, these would not fall under the purview of the proviso to section 2(15) owing to the principle of mutuality. However, if such organizations have dealings with non-members, their claim to be charitable organizations would now be governed by the additional conditions stipulated in the proviso to section 2 (15).