Refi Loan VA form

Notice to Veterans (form) has a section for Veteran to sign
Veteran Signature

In the same form it contains a VA Amendatory Clause that contains a section for Seller & Buyer to sign, who signs this???
IT IS EXPRESSLY AGREED THAT, NOTWITHSTANDING ANY OTHER PROVISIONS OF THIS
CONTRACT, THE PURCHASER SHALL NOT INCUR ANY PENALTY BY FORFEITURE OF
EARNEST MONEY OR OTHERWISE OR BE OBLIGATED TO COMPLETE THE PURCHASE OF
THE PROPERTY DESCRIBED HEREIN, IF THE CONTRACT PURCHASE PRICE OR COST
EXCEEDS THE REASONABLE VALUE OF THE PROPERTY ESTABLISHED BY THE
DEPARTMENT OF VETERANS AFFAIRS. THE PURCHASER SHALL, HOWEVER, HAVE THE
PRIVILEGE AND OPTION OF PROCEEDING WITH THE CONSUMMATION OF THIS CONTRACT
WITHOUT REGARD TO THE AMOUNT OF THE REASONABLE VALUE ESTABLISHED BY THE
DEPARTMENT OF VETERANS AFFAIRS.
Seller Signature
Buyer Signature