TRANSFER RESTRICTIONS

A1: The shares represented by this certificate are subject to restrictions on transfer. A copy of the restrictions will be furnished by the corporation to the holder of this certificate upon written request without charge.

A1-LLC: The units/percentage represented by this certificate are subject to restrictions on transfer. A copy of the restrictions will be furnished by the company to the holder of this certificate upon written request without charge.

A3: The transfer of the shares of the corporation is restricted by the formation document(s). A copy of which is on file at the office of the corporation.

A8: Transferability of the shares represented by this certificate is restricted by the By-Laws. The corporation will furnish to any shareholder of record upon request, without charge a full statement of the restrictions.

A9: The transfer of the shares of the corporation is restricted by the By-Laws. A copy of which is on file at the office of the corporation.

A10: Transfer subject to restrictions in the By-Laws.

A10-LLC: Transfer subject to restrictions in the company agreement.

A11: Transferability of the shares represented by this certificate is restricted by the Shareholders Agreement. The corporation will furnish to any shareholder of record upon request, without charge a full statement of the restrictions.

A12: The transfer of the shares of the corporation is restricted by the Shareholders Agreement. A copy of which is on file at the office of the corporation.

A13: Transfer subject to restrictions in the Shareholders Agreement.

MULTIPLE CLASSES

B1: The corporation will furnish to any shareholder upon request without charge, a full statement of the designation, relative rights, preferences and limitations of each class of shares and series of shares authorized to be issued.

B1-LLC: The company will furnish to any member upon request without charge, a full statement of the designation, relative rights, preferences and limitations of each class of units and series of units authorized to be issued.

B2: The corporation will furnish to any shareholder, upon request without charge, a full statement of the designation, relative rights, preferences and limitations of the shares of each class and series authorized to be issued, and of the authority of the board of directors to divide the shares into classes or series and to determine and change the relative rights, preferences and limitations of any class or series.

PRE-EMPTIVE RIGHTS

D1: There are no pre-emptive rights

TEXAS CLOSE CORPORATION

HTC2: These shares are issued by a close corporation as defined by the Texas Business Organizations Code. Under chapter 21 of that code, a shareholders' agreement may provide for management of a close corporation by the shareholders or in other ways different from an ordinary corporation. This may subject the holder of this certificate to certain obligations and liabilities not otherwise imposed on shareholders of an ordinary corporation. On a sale or transfer of these shares, the transferor is required to deliver to the transferee a complete copy of any shareholders' agreement.

SECURITIES ACT: CERTIFICATES NOT REGISTERED

E1: The shares represented by this certificate have not been registered under the Securities Act of 1933. These shares have been acquired for investment and not with a view to distribution or resale, and may not be mortgaged, pledged, hypothecated, or otherwise transferred without an effective registration statement for such shares under the Securities Act of 1933 or an opinion of counsel for the corporation that registration is not required under such act.

E1-LLC: The units/percentage represented by this certificate have not been registered under the Securities Act of 1933. These units/percentage have been acquired for investment and not with a view to distribution or resale, and may not be mortgaged, pledged, hypothecated, or otherwise transferred without an effective registration statement for such shares under the Securities Act of 1933 or an opinion of counsel for the company that registration is not required under such act.

E2: The shares represented by this certificate have not been registered under the Securities Act of 1933. The shares have been acquired for investment and may not be transferred unless (i) a Registration Statement with respect to the shares shall be effective under the Securities Act of 1933 and there shall have been compliance with applicable state law or (ii) the corporation shall have received a “no action” letter from the Securities and Exchange Commission covering such transfer and the equivalent ruling or letter pursuant to applicable state law, each in form satisfactory to the corporation or (iii) the corporation shall have received an opinion of legal counsel satisfactory to it that no violation of such act, or other applicable law, will be involved in such transfer.