I am educating myself on NOC and NOF to better serve the company I work for. My questions are: 1. How many times do you have to request an NOC from the contractor? 2. Does work completed before filing a NOF have to be performed on the job site or does engineering/permit work done in the office satisfy that requirement? 3. If the NOC is filed with county, do I have to request it from the contractor before filing an NOF or can I simply print it from the county website and file the NOF as required.