A Declaration for Mental Health Treatment must either be signed in front of a notary or two witnesses. If you sign in front of two witnesses, those witnesses cannot be a relative, a care provider, or anyone entitled to inherit from your estate.
A Declaration for Mental Health Treatment expires after three years, so if you want to keep using it you will need to make a new one every three years.
But remember that a Declaration does not become legally binding unless a judge finds you incapacitated. If a judge finds you incapacitated, your declaration will stay in effect until you are no longer incapacitated. This is true even if you’re incapacitated at the time the declaration would have expired. If you want to keep using your declaration once you have capacity again, you would need to make a new one.
If you have more questions about Declaration for Mental Health Treatment or how to prepare one, or if you want to customize one, talk to a lawyer.