If it appears to the commissioner that any licensed securities depository located within this state is conducting business in an unsafe or injurious manner, he shall, by written order addressed to the securities depository direct the discontinuance of such unsafe or injurious practices, or if the licensed securities depository is one which is located outside this state but is soliciting holders of securities in California to place their securities in such securities depository, the commissioner shall direct such securities depository to discontinue all such solicitations until all such unsafe and unsound practices have been corrected.