Treaties — Operation of — Relation to municipal legislation — Treaty for unification of certain municipal rules — Right reserved by Contracting Parties to enact an exception provision deviating from provision in treaty in certain circumstances — Municipal legislation not in accordance with terms of relevant treaty provision — Whether municipal provision without effect and inapplicable — Application of municipal provision in the light of relevant treaty provision — Interpretation of treaty — Preparatory work — Brussels Convention of 1910 for Unification of Certain Rules of Law concerning Collisions at Sea, Article 7 — The law of the Netherlands.