As used in this chapter , unless the context otherwise requires, “book” , “list” , “record” , or “schedule” kept by a county auditor, assessor, treasurer, recorder, sheriff, or other county officer means the county system as defined in section 445.1 . 2000 Acts, ch 1148, §1 C2001, §96.1A 2020 Acts, ch 1062, §94 C2021, §96.1B