As used herein, "responsible person" means and includes any person that causes, creates, allows, permits, suffers, or maintains a public nuisance to exist or continue within the city, by any act or the omission of any act or duty, including, but not limited to, any person having legal title to, or who leases, rents, occupies or has charge, control or possession of, any real property in the city, including all persons shown as owners on the last equalized assessment roll of the Los Angeles County assessor's office. A responsible person shall also include, but shall not be limited to, employees, principals, joint venturers, officers, agents, and/or other persons acting in concert with, or at the direction of, and/or with the knowledge and/or consent of the owner and/or occupant of the lot, building or structure on, or in, which a public nuisance or violation exists or existed, as well as any persons with powers of attorney, executors of estates, trustees, or who are court-appointed administrators, conservators, guardians or receivers. "Responsible person," with regard to personal property, shall be any person who has legal title, charge, control, or possession of such property. The actions or inactions of a responsible person's agent, employee, representative or contractor may be attributed to that responsible person.