Article 9
Regular exchange of data and information
1.Pursuant to article 8, watercourse States shall on a regular basis exchange readily available data
and information on the condition of the watercourse, in particular that of a hydrological, meteorological,
hydrogeological and ecological nature and related to the water quality as well as related forecasts.
2.If a watercourse State is requested by another watercourse State to provide data or information
that is not readily available, it shall employ its best efforts to comply with the request but may condition
its compliance upon payment by the requesting State of the reasonable costs of collecting and, where
appropriate, processing such data or information.
3.Watercourse States shall employ their best efforts to collect and, where appropriate, to process
data and information in a manner which facilitates its utilization by the other watercourse States to
which it is communicated.