This can only be submitted once the VOA has concluded the Check or it is deemed complete.
There are strict time limits for submission of a Challenge. The onus is on the ratepayer or their advisor to provide a full and comprehensive submission which must include their valuation, evidence, comparables, case law and legal arguments etc.
Only then will the VOA disclose their evidence to support their valuation and consider the Challenge. This is the point at which discussion and negotiation will take place. The VOA will issue a decision on the Challenge within 18 months otherwise it is deemed to have been concluded and there is then the right to appeal.