In the event that a juvenile hosts a party, gathering, or event at which an underage person consumes or possesses alcohol, controlled substances and/or marijuana, in violation of this Chapter, and no other Responsible Person is present at such gathering, then the juvenile shall be deemed to be a Responsible Person. If the juvenile is not emancipated within the meaning of the California Family Code, then the parents or legal guardians having custody of that juvenile shall be jointly and severally liable with the juvenile for any penalties and response costs imposed pursuant to this Chapter, whether or not such parents or guardians are deemed to be Responsible Persons hereunder or have or had knowledge of the unruly gathering. (Ord. 2018-3 § 2, 2018.)