The transverse boundary of the sea (LTM) essentially distinguishes the public maritime domain (downstream) from the public river domain (if the watercourse in question is federal) or from the private domain of the riparians (upstream). This is the real limit in the domestic law of the sea, and it is that which serves as a reference for determining the communes “riveraines de la mer” within the meaning of the coastal law.
20 lines indicating the transverse boundary of the sea (LTM) in the relevant rivers of the Finistère.
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