Article 14 6

(a)

at a level as close as possible to each individual potential emission source for aboveground components and components above the sea level;

(b)

at the interface between ground and atmosphere for underground components as a first step and, where a leak is detected as specified in the implementing act adopted in accordance with paragraph 7, as close as possible to the emission source as a second step;

(c)

applying the best detection techniques that are commercially available for offshore components below the sea level or below the seabed.