Question juridique clé
Whether the 1928 contract exempted SBB from the sewer connection fee for the new building.
Solution extraite
No. The contract regulated the transfer and drainage rights for the then-existing situation, not a permanent exemption from later public-law connection fees.
Motifs extraits
The wording and context show that the contract concerned the ownership and drainage consequences of the land transfer. It did not regulate future public sewer fees, and public water-protection rules could not be altered by private agreement.