Revises the involuntary treatment act to require that: (1) A petition to the superior court for a person's initial detention be filed within ten calendar days following the designated mental health professional investigation or the request for a designated mental health professional investigation;

(2) A designated mental health professional or agency disclose the date of a designated mental health professional investigation to an immediate family member, guardian, or conservator of a person to assist in the preparation of a petition; and

(3) A designated crisis responder or agency disclose the date of a designated crisis responder investigation to an immediate family member, guardian, or conservator of a person to assist in the preparation of a petition.

Requires the administrative office of the courts, in collaboration with stakeholders, to develop a user's guide to assist pro se litigants in the preparation and filing of a Joel's law petition and develop a model order of detention which contains an advisement of rights for the detained person.