Proxy of sec 8 company

1.As per rule 19 of company(management and administration) rules 2014 which clearly says about only those members  can be appointed as proxy who is also member of same section 8 company to participate on behalf of the member of same sec-8 co. To participate in meetings of members of that sec-8 co.

2.now the second part of your query has different perspective that means the meeting of members of other company for which appointment of proxy supposed to do on , sec 8 co. being the member of other co. and for participation in the members meeting,section 8 company can authorise any person by way of passing board resolution by the section 8 co..   Read with section 113 of the companies Act, 2013.

Hope so this add some clarity.