failing any provisions to the contrary adopted

[Andrew-Translator]

подскажите пожалуйста значение:
failing any provisions to the contrary adopted pursuant to

Спасибо!

‘net mass’ means the actual mass of the good excluding all
packaging; failing any provisions to the contrary adopted
pursuant to Article 10(4) of the Basic Regulation, the net
mass shall be expressed in kilograms for each subheading
of the Combined Nomenclature;