contract clause

[Монги]

"Weighing and assaying of the Slag and the delivered Matte shall be conducted by the Contractor or an agent to the Contractor in reliable methods customary to the industry and traditionally used by the Contractor. When carrying out the operations of weighing and assaying the Slag and/or Matte, the Contractor agrees to take into consideration any reasonable suggestions made by the Owner or its representatives."

What would be the best way to translate "in reliable methods customary to the industry and traditionally used by the Contractor"?

Thanks

[akhmed]

имхо
надежные методы, характерные для/распространенные в отраслевой практике и традиционно используемые Подрядчиком

[Монги]

thanks again