Regarding arbitration agreements between member firms and customers: A FINRA requires each customer to sign an arbitration agreement as part of the account opening process B each member firm requires customers to sign an arbitration agreement which holds the firm harmless if errors occur C each member firm must provide the customer with a separate copy of the arbitration agreement for signature and return within 10 days of account opening D each member firm must provide the customer with a separate copy of the arbitration agreement for signature and return within 30 days of account opening