2. From 5 May 2026, methane emissions shall be measured in all closed underground coal mines and abandoned underground coal mines where operations ceased after 3 August 1954.
Measurement equipment shall be installed on all elements listed in Part 1, point 1.5, of Annex VIII which were found to emit above 0,5 tonnes of methane per year based on the inventory in paragraph 1 of this Article. That measurement equipment shall take source- level direct measurements or perform source-level quantification in accordance with the applicable standards or technical prescriptions established under Article 32, at least on an hourly basis and of sufficient quality to allow for a representative estimation of annual methane emissions from all elements listed in Part 1, point 1.5, of Annex VIII which were found to emit methane. Until the date of application of those standards or technical prescriptions, mine operators shall follow state-of-the-art industry practices and use the best available technologies for the measurement and quantification of methane emissions. Mine operators shall provide competent authorities and verifiers with information on the standards, including European or other international standards, technical prescriptions or methodologies used.
The measurement equipment shall operate for more than 90 % of the period for which it is used to monitor methane emissions, excluding downtime taken for re-calibration and repair.