Sorry, I can't possibly say. For the following reasons:
1. Agreement between the industry bodies proposing the idea is needed. Nothing will happen until this is secured.
2. Knowledge of EASA's concepts will be required.
3. A formal industry proposal would then be put to the CAA.
4. The CAA would then need to decide whether a Regulatory Impact Assessment is needed.
5. Consultation with all interested parties may be needed.
6. Amendment to the ANO would be needed.
None of the above have any sure timescales.