| Illicit Sale of Liquor Act 1913 | 036 of 1913 (4 Geo. V No. 36) |  Official Version |  Unavailable |  Unavailable | |
| Imperial Act Adopting Ordinance 1847 | 1847 (10 Vict. No. 8) | Official Version | Unavailable | Unavailable | |
| Imperial Acts Adopting Act 1836 | 1836 (6 Will. IV No. 4) | Official Version | Unavailable | Unavailable | |
| Imperial Acts Adopting Act 1844 | 1844 (7 Vict. No. 13) | Official Version | Unavailable | Unavailable | |
| Imperial Acts Adopting Ordinance 1849 | 1849 (12 Vict. No. 21) | Official Version | Unavailable | Unavailable | |
| Imperial Acts Adopting Ordinance 1867 | 1867 (31 Vict. No. 8) | Official Version | Unavailable | Unavailable | |
| Income Tax Assessment Act 1937 | 013 of 1937 (1 & 2 Geo. VI No. 13) | Official Version | Unavailable | Unavailable | |
| Indecent Publications Act 1902 | 1902 (2 Edw. VII No. 14) | Official Version | Unavailable | Unavailable | |
| Indecent Publications and Articles Act 1902 | 1902 (2 Edw. VII No. 14) | Official Version | Unavailable | Unavailable | |
| Indian Ocean Territories (Administration of Laws) Act 1992 | 054 of 1992 | Official Version | Word | HTML | |
| Industrial Arbitration Act 1912 | 057 of 1912 (3 Geo. V No. 38) | Official Version | Unavailable | Unavailable | |
| Industrial Arbitration Act 1979 | 114 of 1979 | Official Version | Word | HTML | |
| Industrial Development (Kwinana Area) Act 1952 | 002 of 1952 (1 Eliz. II No. 2) | Official Version | Unavailable | Unavailable | |
| Industrial Development (Resumption of Land) Act 1945 | 049 of 1945 (9 & 10 Geo. VI No. 49) | Official Version | Unavailable | Unavailable | |
| Industrial Lands (CSBP & Farmers Ltd.) Agreement Act 1976 | 031 of 1976 | Official Version | Word | HTML | |
| Industrial Lands Development Authority Act 1966 | 060 of 1966 | Official Version | Unavailable | Unavailable | |
| Industrial Lands (Kwinana) Agreement Act 1964 | 093 of 1964 (13 Eliz. II No. 93) | Official Version | Word | HTML | |
| Industrial Lands (Kwinana) Railway Act 1966 | 015 of 1966 | Official Version | Word | HTML | |
| Industrial Relations Act 1979 | 114 of 1979 | Official Version | Word | HTML | |
| Industrial Training Act 1975 | 095 of 1975 | Official Version | Word | HTML | |
| Industries Assistance Act 1915 | 027 of 1915 (5 Geo. V No. 54) | Official Version | Unavailable | Unavailable | |
| Industry (Advances) Act 1947 | 053 of 1947 (11 & 12 Geo. VI No. 53) | Official Version | Unavailable | Unavailable | |
| Industry and Technology Development Act 1998 | 013 of 1998 | Official Version | Word | HTML | |
| Inebriates Act 1912 | 047 of 1912 (3 Geo. V No. 28) | Official Version | Unavailable | Unavailable | |
| Infants' Property Act 1830 (Imp) | 1830 (11 Geo. IV & 1 Will. IV c. 65) | Official Version | Word | HTML | |
| Inheritance (Family and Dependants Provision) Act 1972 | 057 of 1972 | Official Version | Word | HTML | |
| Inquiry Agents Licensing Act 1954 | 011 of 1954 (3 Eliz. II No. 11) | Official Version | Unavailable | Unavailable | |
| Inspection of Machinery Act 1921 | 011 of 1922 (12 Geo. V No. 45) | Official Version | Unavailable | Unavailable | |
| Inspection of Scaffolding Act 1924 | 039 of 1924 (15 Geo. V No. 39) | Official Version | Unavailable | Unavailable | |
| Inspector of Custodial Services Act 2003 | 075 of 2003 | Official Version | Word | HTML | |
| Insurance Commission of Western Australia Act 1986 | 051 of 1986 | Official Version | Word | HTML | |
| Interpretation Act 1918 | 030 of 1918 (9 Geo. V No. 20) | Official Version | Unavailable | Unavailable | |
| Interpretation Act 1984 | 012 of 1984 | Official Version | Word | HTML | |
| Iron and Steel (Mid West) Agreement Act 1997 | 010 of 1997 | Official Version | Word | HTML | |
| Iron Ore - Direct Reduced Iron (BHP) Agreement Act 1996 | 005 of 1996 | Official Version | Word | HTML | |
| Iron Ore Beneficiation (BHP) Agreement Act 1996 | 004 of 1996 | Official Version | Word | HTML | |
| Iron Ore (Channar Joint Venture) Agreement Act 1987 | 061 of 1987 | Official Version | Word | HTML | |
| Iron Ore (Cleveland Cliffs) Agreement Act 1964 | 091 of 1964 (13 Eliz. II No. 91) | Official Version | Word | HTML | |
| Iron Ore (Goldsworthy-Nimingarra) Agreement Act 1972 | 030 of 1972 | Official Version | Word | HTML | |
| Iron Ore (Hamersley Range) Agreement Act 1963 | 024 of 1963 (12 Eliz. II No. 24) | Official Version | Word | HTML | |
| Iron Ore (Hope Downs) Agreement Act 1992 | 062 of 1992 | Official Version | Word | HTML | |
| Iron Ore (Marillana Creek) Agreement Act 1991 | 002 of 1991 | Official Version | Word | HTML | |
| Iron Ore (McCamey's Monster) Agreement Authorisation Act 1972 | 104 of 1972 | Official Version | Word | HTML | |
| Iron Ore (Mount Bruce) Agreement Act 1972 | 037 of 1972 | Official Version | Word | HTML | |
| Iron Ore (Mount Goldsworthy) Agreement Act 1964 | 097 of 1964 (13 Eliz. II No. 97) | Official Version | Word | HTML | |
| Iron Ore (Mount Newman) Agreement Act 1964 | 075 of 1964 (13 Eliz. II No. 75) | Official Version | Word | HTML | |
| Iron Ore (Murchison) Agreement Authorisation Act 1973 | 050 of 1973 | Official Version | Word | HTML | |
| Iron Ore Processing (BHP Minerals) Agreement Act 1994 | 030 of 1994 | Official Version | Word | HTML | |
| Iron Ore (Rhodes Ridge) Agreement Authorisation Act 1972 | 036 of 1972 | Official Version | Word | HTML | |
| Iron Ore (Robe River) Agreement Act 1964 | 091 of 1964 (13 Eliz. II No. 91) | Official Version | Word | HTML | |
| Iron Ore (Wittenoom) Agreement Act 1972 | 038 of 1972 | Official Version | Word | HTML | |
| Iron Ore (Yandicoogina) Agreement Act 1996 | 065 of 1996 | Official Version | Word | HTML | |
