ST. CHARLES, Missouri — St. Charles County would generally have to delete automated license-plate reader images and related data within 30 days under a bill set for introduction Monday. The council also has a separate proposal to accept $12,761 for five reader systems.

Bill 5544 would require written police policies covering who may access the data, how searches are audited, how records can be shared and how long they are retained. It would bar the county from integrating the readers or their data with facial-recognition technology.

The 30-day limit would have exceptions for specific active criminal investigations, life-safety emergencies such as missing-person cases, and court orders or other legal authority. The proposed rules also call for police to verify reader alerts before taking enforcement action.

The ordinance would leave detailed implementation to the police chief. Both proposals are listed for introduction at the council’s 7 p.m. meeting Monday at the County Executive Building, 100 North Third Street.