We are a GC, with a project in North Dakota. We completed all contract/change order work in June and have some punchlist work to complete in September once we are able to receive the materials needed to do the work. I can't find anywhere if punchlist work can be basis of determining last date provided to the project. In the meantime, we are using the June contract/CO completion date to track our upcoming September notice and lien deadline. Is this correct?