... areas, or parts thereof, aimed at the prevention, control and reduction of transboundary impact and aimed at the protection of the environment of transboundary waters or the environment influenced ... including the marine environment The application of this Convention shall not lead to the deterioration of environmental conditions nor lead to increased transboundary impact The provisions of this Convention ... substances, on the one hand, and the potential transboundary impact, on the other hand; (b) The polluter-pays principle, by virtue of which costs of pollution prevention, control and reduction measures...