Regulation 13 Revision of meter (1) A supplier shall each year undertake an audit of meters that have been in operation for twenty years or more and replace at least 75% of the meters each year. (2) Despite subregulation (1), the supplier shall, within six months after commencement of these Regulations, submit to the Commission (a) an audit report of the meters in operation for twenty years or more, and (b) a programme for replacement of the meters within the subsequent twelve months. (3) A supplier who does not comply with these requirements under these Regulations shall be considered to be in breach of a mandatory technical performance indicator requirement for Public Utilities Regulatory Commission's electricity tariff review.