An applicant alleging Parliament failed to fulfil its obligation under section 141(a) to facilitate public involvement must demonstrate either: (a) that Parliament did not involve the public at all in the legislative process, or (b) that Parliament's facilitation was merely token and lacked substance. Where alleging inadequate facilitation, the applicant must reference the entire range of measures taken by Parliament and demonstrate how the cumulative effect of all measures failed to meet the constitutional threshold. The right created by section 141 is a public right, not an individual right - it grants the public the right to be afforded an opportunity to be engaged, not a right for every citizen to be individually heard. Parliament retains discretion to determine the methodology by which the public will be involved, subject to judicial review for adequacy. Disruption of some participation mechanisms does not establish constitutional failure where Parliament provided multiple adequate avenues for public involvement. The validity of legislation challenged on grounds of procedural defects in the legislative process is not rendered moot by the Bill's enactment, as the Act's validity depends on the integrity of the process that produced it.