It is the duty of the owner on a private job to prepare it and sign it. Many might not know this, but the lender is responsible to record it. If there isn’t a lender, then the owner should record it. The owner is the one who should post a certified copy on the job site. This Notice of Commence is required by law to be recorded prior to improvements start, but not more than 90 days before work begins.
Generally, this notice of commencement remains effective for just one year. It could be a different time period of it is so noted in the notice of commencement. Easy to mess that part up, so be careful to watch for the dates. It is possible to do an amended notice of commencement which can be recorded to extend time if things are taking longer than first expected. I wonder how many times they amended the notice of commencement for the new VA hospital in Orlando, or if they needed to do one on this federal job? It is also possible to shorten the time by recording a termination of notice of commencement.