— Failure to comply with requirement as to time does not render an act invalid — Scope — Article 254 is merely a saving provision, i.e., it prevents the act or thing required mandatorily to be done within a prescribed period from becoming unconstitutional if not so done — The provision does not however confer a power on an authority or forum required to do the act or thing to unilaterally extend the period, or shield any purported extension from judicial scrutiny and (if so found appropriate) legal condemnation. [2023 SCLR 74 = 2023 SCMR 2165 = 2023 SCP 211]