Each financial institution which becomes a member of a corporation organized under this Act is authorized to acquire, purchase, hold, sell, assign, transfer, mortgage, pledge, or otherwise dispose of any bonds, securities or other evidences of indebtedness issued by such corporation or the shares of its capital stock and while owners of the stock to exercise all the rights, powers and privileges of ownership, including the right to vote thereon, all without the approval of any regulatory authority of this State. The amount of capital stock of such corporation which any member is authorized to acquire pursuant to the authority granted herein shall be in addition to the amount of capital stock in corporations which such member may otherwise be authorized to acquire, provided, however, that no financial institution shall become a shareholder of more than one development credit corporation.