1. The operator shall regularly check whether the monitoring methodology plan reflects the nature and functioning of the installation and whether it can be improved. To this end, the operator shall take account of any recommendations for improvements included in the relevant verification report.

2. The operator shall modify the monitoring methodology plan in any of the following situations:

(a) new emissions or activity levels occur due to new activities carried out or due to the use of new fuels or materials not yet contained in the monitoring methodology plan;

(b) the use of new measuring instrument types, new sampling or analysis methods or new data sources, or other factors, lead to higher accuracy in the determination of reported data;

(c) data resulting from the previously applied monitoring methodology has been found incorrect;

(d) the monitoring methodology plan is not, or no longer, in conformity with the requirements of this Regulation;

(e) it is necessary to implement recommendations for improvement of the monitoring methodology plan contained in a verification report.

3. The operator must notify the regulator of:

(a) any significant modification (within the meaning of paragraph 5) of the monitoring methodology plan at least 14 days before making the modification or, where this is not possible, as soon as reasonably practicable; and