In this subchapter:
(1) "Declaration" means a written declaration of a person that:
(A) designates another person to serve as a guardian of the person or estate of the declarant; and
(B) satisfies the requirements of this subdivision and Sections 1104.202, 1104.203, 1104.204, 1104.205, 1104.207, 1104.210, 1104.211, and 1104.212.
(2) "Self-proving affidavit" means an affidavit the form and content of which substantially comply with the requirements of Section 1104.204.
(3) "Self-proving declaration" includes a self-proving affidavit that is attached or annexed to a declaration.