http://www.legislation.gov.uk/apni/1933/5/section/1Destructive Imported Animals Act (Northern Ireland) 1933An Act to make provision for prohibiting or controlling the importation into and the keeping within Northern Ireland of destructive non-indigenous animals, for exterminating any such animals which may be at large, and for purposes connected with the matters aforesaid.texttext/xmlenStatute Law Database2021-07-21Expert Participation2020-12-31 11The Ministry of Agriculture may prohibit by order either absolutely, or except under a licence granted under this Act, the importation into and the keeping within Northern Ireland of any animal of the species designated Fiber zibethicus or Ondatra zibethica, and commonly known as the musk rat, or musquash.An order made under this sub-section may prohibit absolutely the importation of musk rats notwithstanding that the keeping of them is not prohibited absolutely.2Every order made under sub-section (1) of this section shall, so soon as may be after it is made, be laid before each House of Parliament. If either House of Parliament, within the statutory period next after any order made as aforesaid has been laid before such House, resolves that the order shall be annulled, the order shall, after the date of the resolution, be void, but without prejudice to the validity of anything previously done thereunder or to the making of a new order.