Notice of Commencement Who Files

[Zana Blue]

I'm trying to get extensive electrical work done on a rehab and I signed and notarized the notice of commencement so the contractor could pull the permit and they called me on Friday at 4PM and told me I had to file it before they started on Monday...I have NEVER had a contractor tell me I had to file especially when the job is over $6500...that should be up to them ...I do not even know where to file it...am I wrong ?