In this subchapter:
(1) "Declaration" means a written declaration of a person that:
(A) appoints a guardian for the person's child under Section 1104.053(a) or 1104.103(a); and
(B) satisfies the requirements of this subdivision and Sections 1104.152, 1104.153, 1104.154, 1104.156, 1104.159, and 1104.160.
(2) "Self-proving affidavit" means an affidavit the form and content of which substantially comply with the requirements of Section 1104.153.
(3) "Self-proving declaration" includes a self-proving affidavit that is attached or annexed to a declaration.