The client letter to Form 709 says each spouse should "also sign and enter the date on this Form 709 in the Consenting Spouse's Signature are on line 18 of page 1."  I do not see this on the form, I only see Part III line 7 on page 2.  "you must attach a Notice of Consent".

I pulled up old 709 forms and don't see it on the old forms either.