Except as provided in § 5-331 of this subtitle, a petition for guardianship shall precede a petition for adoption under this subtitle. Only the individual who would be subject to guardianship or a local department may file a petition for guardianship under this Part II of this subtitle. A petition for guardianship of an individual shall be filed before the individual attains 18 years of age. A petitioner under this section shall attach to a petition: all written consents for the guardianship that the petitioner has; if applicable: proof of guardianship or relinquishment of parental rights granted by an administrative, executive, or judicial body of a state or other jurisdiction; and certification that the guardianship or relinquishment was granted in compliance with the jurisdiction’s laws; and a notice of filing that: states the date on which the petition was filed; identifies each person whose consent was filed with the petition; states the obligation of a parent to give the juvenile court and local department notice of each change in the parent’s address; has printed on it the website that the Department maintains under § 2–302 of the Human Services Article; and includes no identifying information that would be in violation of an agreement or consent.