▁movement . ▁ ▁When ▁the ▁polit icians ▁demonstrated ▁they ▁would ▁not ▁change ▁their ▁minds , ▁the ▁Y ol ng u ▁of ▁Y ir r k ala ▁took ▁their ▁gr iev ances ▁to ▁the ▁courts ▁in ▁ 1 9 7 1 , ▁in ▁the ▁case ▁of ▁Mil ir rp um ▁v ▁N ab al co ▁P ty ▁Ltd , ▁or ▁the ▁G ove ▁land ▁rights ▁case . ▁Y ol ng u ▁lost ▁the ▁case ▁because ▁Australian ▁courts ▁were ▁still ▁bound ▁to ▁follow ▁the ▁terra ▁n ul lius ▁principle , ▁which ▁did ▁not ▁allow ▁for ▁the ▁recognition ▁of ▁any ▁prior ▁rights ▁to ▁land ▁to ▁Ind igen ous ▁people ▁at ▁the ▁time ▁of ▁colon isation . ▁However , ▁the ▁Judge ▁did ▁acknow ledge ▁the ▁claim ants ' ▁rit ual ▁and ▁economic ▁use ▁of ▁the ▁land ▁and ▁that ▁they ▁had ▁an ▁established ▁system ▁of ▁law , ▁p aving ▁the ▁way ▁for ▁future ▁Ab original ▁Land ▁Rights ▁in ▁Australia . ▁It ▁was ▁said ▁to ▁have ▁played ▁a ▁vital ▁part ▁in ▁p aving ▁the ▁way ▁to ▁the ▁recognition ▁of ▁Ab original ▁land ▁rights ▁in ▁the ▁Ab original ▁Land ▁Rights ▁Act ▁ 1 9 7 6 ▁and ▁the ▁M ab o ▁decision ▁in ▁ 1 9 9 2 . ▁ ▁The ▁song ▁" T re aty ", ▁by ▁Y oth u ▁Y indi , ▁which ▁became ▁an ▁international ▁hit ▁in ▁ 1 9 8 9 , ▁arose ▁as ▁a ▁rem on str ation ▁over ▁the ▁tard iness ▁of ▁the ▁Haw ke ▁government ▁in ▁en act ing ▁promises ▁to ▁deal ▁with