(a) A certificate shall not be a good delivery with an assignment or power of substitution executed by a: (1) person since deceased; (2) trustee or trustees, except as provided in paragraph (b) of this Rule, or except for trustees acting in the capacity of a board of directors of a corporation or association, in which case Rule 11571(a) shall apply; (3) guardian, except as provided in paragraph (b) of this Rule; (4) infant; (5) executor

A certificate with an assignment or a power of substitution executed in the name of a firm that has since dissolved and is succeeded by a firm or firms having as general partners one or more of the general partners of the dissolved firm shall be a good delivery only if the new firm or one of the new firms shall have signed the statement "Execution Guaranteed" under a date subsequent to the formation of the new firm so signing.

Unless the endorsement specifies otherwise, there shall be a presumption that stock registered in a firm or business name is registered in the name of a partnership and not a corporation.

(a) Transfer Books Open

A certificate in the name of a corporation or an institution, or in a name with official designation shall be a good delivery only if the statement "Proper papers for transfer filed by assignor" is placed on the assignment and signed by the transfer agent.

(b) Transfer Books Closed

Where a certificate, an assignment or a power of attorney is in the name of a corporation and the transfer

(a) General Requirements

Any registered security to be a good delivery must be accompanied by an assignment and a power of substitution (when such power of substitution is required under paragraph (g) of this Rule) conforming to the requirements set forth in Rule 11550 to 11574, inclusive.

(a) Documents Required

When the laws, regulations, rulings, instructions or orders of any government, government instrumentality or agency, or official thereof having jurisdiction, require a license, clearance certificate, affidavit of ownership or any similar document in connection with the acquisition, disposition, transfer or redemption of, or other dealing in or with respect to, any security, such security shall not be a good delivery unless accompanied by the document or documents so required.

A certificate of stock or a bond shall cease to be a good delivery upon publication of notice of call for redemption, except when an entire issue is called for redemption and except against transactions in "called stock" or "called bonds" dealt in specifically as such.

(b) Securities Deemed Worthless

(a) A mutilated security shall not be a good delivery until appropriately authenticated by the trustee, registrar, transfer agent, or issuer.

(b) The delivery of a bond which bears a coupon which has been mutilated as to the bond number or signature or which bears a coupon which has been canceled in error shall not be good delivery unless an appropriate endorsement by an official authorized by paragraph (c) of this Rule, in the form required by the Committee, shall have been placed on the reverse of the