Start by raising an early warning and holding a risk reduction meeting to share concerns and see what measures can/should be put into place to minimize further delay. You should remind the Contractor that you are/will be charging delay damages (assuming you have them under X7) for this over-run.
I think the key thing here is to talk. Find out what their issues are, make them clear how important this is to you, and try to find a way forward to allow Completion to be achieved at the earliest opportunity. Obviously see if there is anyway that your concerns of final compliance could be alleviated.
This might be a good one to put into the LinkedIn group as a discussion to see what multiple tips you can get from other professionals.
I think the key thing here is to talk. Find out what their issues are, make them clear how important this is to you, and try to find a way forward to allow Completion to be achieved at the earliest opportunity. Obviously see if there is anyway that your concerns of final compliance could be alleviated.
This might be a good one to put into the LinkedIn group as a discussion to see what multiple tips you can get from other professionals.