On the basis of principles of equality of rights, respect of national sovereignty, mutual benefit and trust, and no interference in internal affairs,

The uncertainty (on a 95 % confidence interval) of the measurement methods will be evaluated in accordance with the principles of the ISO "Guide to the Expression of Uncertainty in Measurement" (1993), or the methodology of ISO 5725-1 "Accuracy (trueness and precision) of measurement methods and results" (1994) or equivalent.