Notwithstanding the legitimate reasons for opening or maintaining such accounts, all that FINRA asks is for prior written notice (or prompt notice for pre-existing accounts).

FORBES: Outside Brokerage Accounts On FINRA's Radar

From June 2010 through September 2010, the AWC alleges that Kai solicited four EDJ customers to invest in GPH without giving the firm prior written notice of the proposed transactions and his proposed role.

FORBES: Stockbroker's Outside Business Activity Becomes FINRA Private Securities Transaction