This document has been developed to assist Member States in fulfilling their reporting obligations under Commission Implementing Regulation (EU) 2023/1162 which addresses interoperability requirements and establishes non-discriminatory and transparent procedures for accessing electricity metering and consumption data. This Implementing Regulation was adopted in June 2023 as the first in a series of implementing acts under the Electricity Directive and marks a significant milestone in the Digitalisation of Energy Action Plan. These new technical rules aim to lower barriers for new market entrants, optimise operations for retailers and system operators, and foster innovation in energy services, notably in energy efficiency and renewable energy.