Interpretation Act 1965 · 2020 Revised Edition · Part 3 · Subsidiary Legislation
23. Commencement of subsidiary legislation
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subsidiary legislation
“subsidiary legislation” means any order in council, proclamation, rule, regulation, order, notification, by‑law or other instrument made under any Act, Ordinance or other lawful authority and having legislative effect;
unless it is otherwise expressly provided in any Act, must be published in the Gazette; and
unless it is otherwise provided in the subsidiary legislation, takes effect and comes into operation on the date of its publication.
Any such subsidiary legislation may be made to operate retrospectively to any date not being a date earlier than the commencement of the Act or the establishment of the authority by or under which the subsidiary legislation is made.
commencement
“commencement”, in relation to an Act, means the time at which the Act comes into operation in Singapore;