A participating county in the Real Property Assessment Demonstration Program must provide its implementation plan not less than how many days prior to October 1?

In the context of the Real Property Assessment Demonstration Program, a participating county is required to submit its implementation plan at least 60 days before October 1. This lead time allows for adequate review and preparation, ensuring that the assessment processes can be effectively implemented and that stakeholders are informed of the changes.

The requirement for a 60-day notice aligns with administrative practices that aim to provide sufficient time for planning and adjusting to new protocols. Notifying stakeholders early helps manage expectations and allows for smoother transitions in the assessment processes. This time frame is critical for counties to coordinate their efforts and resources to meet the goals of the program effectively.

The other choices reflect shorter notice periods that may not provide enough time for the necessary preparations and stakeholder communications required for effective implementation of the program.