What are the sources of technical barriers to trade?

      Technical barriers to trade generally result from the preparation, adoption and application of
      different technical regulations and conformity assessment procedures. If a producer in country A wants
      to export to country B, he will be obliged to satisfy the technical requirements that apply in country B,
      with all the financial consequences this entails. Differences between one country and another in their
      technical regulations and conformity assessment procedures may, however, have legitimate origins also.