1. The regulated entity shall determine the released fuel amounts of a fuel stream in one of the following ways:

(a) where the regulated entities and the fuel streams covered correspond to entities with reporting obligations under and energy products subject to national legislation transposing Directives 2003/96/EC and (EU) 2020/262, on the basis of the measurement methods used for the purposes of those acts when those methods are based on national metrological control;

(b) on the basis of aggregation of measurement of quantities at the point where the fuel streams are released for consumption;

(c) on the basis of continual measurement at the point where the fuel streams are released for consumption.

However, the competent authorities may require the regulated entities to use, where applicable, only the method referred to in the first subparagraph, point (a).