The binding legal principles established are: (1) Constitutional provisions in sections 152(1)(c), 195(1)(b) and 229(2)(a) concerning municipal economic policy, social and economic development, and efficient resource use are not justiciable by courts and require judicial deference to municipal councils. (2) The phrase 'general purport' in section 10G(7)(c)(i) of the LGTA does not require detailed specifications in public notices but only main features; it is sufficient for a notice to state that a budget has been adopted and invite inspection of details at municipal offices. (3) For a communication to qualify as an 'objection' under section 10G(7)(c)(iv) of the LGTA, it must be lodged in writing within 14 days after the date on which the notice is first displayed. (4) Mere failure to comply with administrative provisions does not automatically render municipal resolutions void - the court must consider whether the Legislature intended nullity as a consequence and whether the failure was material. (5) Inordinate delay in challenging municipal rate-setting decisions may render it impractical and unjust to set aside such decisions, particularly where this would disrupt essential municipal services and revenue streams.