Notices go up at least 72 hours before a meeting, public comment is 3 minutes per speaker, and you will be asked which agenda item you are addressing. Here is how the procedure works and why a comment is not the same as an adopted ordinance.
Permit files are kept for 10 years after the final permit action and ordinary Planning & Building correspondence for 3 years. A pending request or hold stops the clock, and disposal is a logged decision, not a move to another folder.
The County Clerk logs it, acknowledges it within 10 business days, explains any copy fee in writing, and reviews exemptions one at a time. Here is each step, and what an acknowledgement does and does not promise.