In this Act -
the word "statute" includes (in addition to Acts of the Oireachtas) Acts of the Oireachtas of Saorstát Eireann, Acts of the Parliament of the former United Kingdom of Great Britain and Ireland, and Acts of a Parliament sitting in Ireland at any time before the coming into force of the Union with Ireland Act, 1800;
the word "instrument" means an order, regulation, rule, bye-law, warrant, licence, certificate, or other like document;
the expression "statutory instrument" means an instrument made, issued, or granted under a power or authority conferred by statute;
references to instruments made wholly or partly under an Act of the Oireachtas shall be construed as referring to instruments made, issued, or granted under a power or authority conferred by an Act of the Oireachtas or conferred by the joint operation of an Act of the Oireachtas and some other statute.