; (ii) is executed in accordance with the law governing advance directives of the State involved; and (iii) is offered by an entity that has received accreditation from the Secretary under this section. (B) Eligible Beneficiary The term eligible beneficiary means an individual enrolled under this part. (3) Voluntary Participation in the Program shall be voluntary with respect to the eligible beneficiary and an eligible beneficiary who has registered a certified advance directive under the Program may terminate such directive at any time. Nothing in this section shall require an eligible beneficiary to adopt or maintain a certified advance directive. (4) Best practices In establishing and implementing the Program, the Secretary shall consider— (A) best practices within existing advance directive registry technologies, programs, and systems, including web-based or cloud-based advance directive technologies— (i) which may utilize time and date stamps, video, or other innovative measures to protect the authenticity, improve the quality, and enhance the security of such directives; and (ii) which may utilize secure email and messaging technologies and nationally recognized health care information technology standards to improve the accessibility and interoperability of such directives