What is the ruling on subscribing to the Commercial Professionals Syndicate in Egypt, and what about paying a financial fine for delay when there are doubts about the Syndicate's investment of funds in usurious banks?

It is not permissible to subscribe to a syndicate that deposits its members' funds in interest-based banks to obtain prohibited usurious benefits if the subscription is optional. However, if you are compelled to subscribe, then necessities permit prohibitions, with the obligation to dispose of the usurious benefits upon receiving the dues.