Article 42 4.

Test, measurement and calculation methods referred to in Article 39 which are in conformity with common specifications established by implementing acts referred to in paragraph 1 of this Article or parts thereof shall be presumed to be in conformity with the requirements set out in that Article and with test, measurement and calculation requirements set out in delegated acts adopted pursuant to Article 4 to the extent that those requirements are covered by such common specification or parts thereof.