A licensed child-placing agency or local board may place for adoption, and is empowered to consent to the adoption of, any child who is properly committed or entrusted to its care, in accordance with the provisions of §§ 63.2-900, 63.2-903, 63.2-1817 or this section, when the order of commitment or the entrustment agreement between the birth parent(s) and the agency or board provides for the termination of all parental rights and responsibilities with respect to the child for the purpose of placing and consenting to the adoption of such child. The entrustment agreement shall divest the birth parent(s) of all legal rights and obligations with respect to the child, and the child shall be free from all legal obligations of obedience and maintenance with respect to them, provided that such rights and obligations may be restored to the birth parent(s) and the child by circuit court order prior to the entry of a final order of adoption upon proof of fraud or duress. An entrustment agreement for the termination of all parental rights and responsibilities shall be executed in writing and notarized, and shall be revocable prior to entry of an order finalizing the agreement (i) upon proof of fraud or duress, or (ii) after the placement of the child in an adoptive home upon written mutual consent of the birth parents and prospective adoptive parents.