Under the MRA, Distribution Businesses are required to operate a Metering Point Registration System (MPRS) to support the Change of Supplier process in the GB electricity market. MPRS Validation Rules provide a standardised definition of how an MPRS should process inbound and outbound data, and include:
- Business Entity rules;
- Data Flow Validation rules;
- Additional rules; and
- Rejection Reason Codes.
The current version is MPRS Validation Rules v6.8 .