The binding legal principles established are: (1) In calculating the 30-day appeal period under section 148(3) of the National Water Act, section 4 of the Interpretation Act applies, excluding the first day and including the last day, and excluding weekends and public holidays when they fall on the last day; (2) For condonation applications, the Melane factors apply (degree of delay, reasons for delay, prospects of success, prejudice to respondent, and importance of case), but these are interrelated and not necessarily cumulative; (3) A delay of two days falling over a weekend when the Tribunal office is closed is insignificant and can be condoned where there are prospects of success; (4) Appeals with prima facie grounds raising substantive challenges regarding scientific uncertainty, non-compliance with statutory obligations, and procedural irregularities such as inadequate public participation carry prospects of success warranting condonation; (5) Section 148(2)(b) of the National Water Act automatically suspends a water use licence upon lodging of an appeal unless the Minister directs otherwise; parties cannot unilaterally determine the validity of appeals and act contrary to the suspension provision; (6) Prejudice created by an applicant's own decision to proceed with activities before securing all necessary authorizations is self-imposed and not a decisive factor against granting condonation.