The binding legal principles are: (1) Municipal by-laws permitting water disconnection for non-payment are intra vires enabling legislation and constitutional, provided they incorporate reasonable dispute resolution mechanisms and adequate notice requirements. (2) The constitutional right to safe, clean and potable water under section 77 is a progressive right to be achieved within available resources, not an absolute right to immediate provision of water on demand. (3) Disconnection of water supply for non-payment, when exercised reasonably and in compliance with procedural safeguards in by-laws, does not violate the constitutional right to water. (4) Courts must apply benevolent interpretation to municipal by-laws, presuming they will be reasonably administered, and should only strike them down if they are manifestly unreasonable, unjust, arbitrary or oppressive. (5) The phrase "in the opinion of the council" in by-laws must be construed as requiring an objective reasonable opinion, not unfettered subjective discretion, especially when qualified by procedural safeguards. (6) By-laws must be read as a composite whole, not in isolation, and in a purposive manner having regard to the overall objects of the enabling statute.