Most regulatory authorities have their own ideas but I think you'll be better off asking them directly. Regardless of the whatever might be needed to re-commission it, you might want to think about the possible effect on an official navaid that might be operating nearby on the same, or a similar, frequency. That might just make it a flight safety issue.
Reading between the lines of what you say, I take it that you're planning to use it for "unofficial" approaches. This is a very silly idea for any number of reasons - not the least of which is that you might be creating a safety hazard for aircraft using OFFICIAL approaches.
I really think you need to talk to the CAA, to find out what they think about this whole plan. If it was in this country (ie the country I'm in), you would most certainly not get approval to use it for anything that does not contribute to the official airways system.