Honestly, I'd have to read the Advanced Directive to see what its scope is. I assume it's limited to making medical decisions in specific circumstances.
Yes, the Advance Directive is specifically for medical decisions when a person has become incapacitated and unable to speak for themselves regarding medical treatment. Specifics for Virginia...
"Under the Virginia Health Care Decisions Act, a medical advance directive lets you name a healthcare agent, state specific treatment wishes (living will), and outline organ donation preferences. It becomes active only if two doctors formally determine you lack the capacity to make informed medical choices."
I assume that you could state treatment wishes and organ donation preferences without naming an agent, so at least medical providers would know whether you would/would not want to be on life support or donate any organs.
Key Powers Included Under the Act
Healthcare Agent: Name a trusted person to make medical choices if you cannot speak for yourself.
Living Will Directives: Accept or refuse life-prolonging procedures, ventilators, and artificial nutrition/hydration during terminal conditions or a persistent vegetative state.
Pain Management: Detail your explicit preferences for comfort care and pain relief.
Anatomical Gifts: Document instructions for organ, tissue, or eye donation.
Legal Limits and Exclusions Incapacity Requirement: Must be certified by your attending physician and a second independent doctor.
Prohibited Powers: An agent cannot consent to an abortion, nontherapeutic sterilization, or psychosurgery on your behalf.
Execution Rules: Must be in writing and signed before two adult witnesses; notarization is not required.