Rule D-9 codifies, as a definitional rule of general application, the definition of the term “customer” presently set forth in various Board rules. Employees and other associated persons of brokers, dealers and municipal securities dealers would, under this definition, be “customers” with respect to transactions effected for their personal accounts. An issuer would be a “customer” within the meaning of the rule except in the case of a sale by it of a new issue of its securities.