Whether the investigators are at the AER or any other similar agency, or the enforcement arm of a police force, they are very independent. They will conclude their investigation when they believe they have concluded all of the work they need to do. The determinations will be released at that time.
There is a formal clock in the AER structure that says it must be completed within two years. We're a few months away from the start of this, so we can expect that it will be somewhere in the next 12 to 16 months.