Complex sentence: A separate Order of Australia (analogous to the Order of Canada) was established in 1975 with knighthoods and damehoods on offer; they were discontinued in 1983, controversially re-established in 2014, and discontinued again in 2015.
Split into simpler sentences: A separate Order of Australia (analogous to the Order of Canada) was established in 1975, with a level of knighthood and damehood. That level was discontinued in 1983, re-established in 2014, and discontinued again in 2015.