▁Council ▁to ▁have ▁the ▁area ▁preserved ; ▁it ▁was ▁gaz ett ed ▁in ▁ 1 9 6 1 ▁as ▁a ▁Nature ▁Reserve ▁for ▁' the ▁Pres ervation ▁of ▁Ab original ▁Rel ics ', ▁at ▁a ▁period ▁when ▁conser ving ▁Ab original ▁sites ▁was ▁unusual . ▁Kay ▁led ▁school ▁students ▁on ▁conducted ▁t ours , ▁explaining ▁the ▁history ▁and ▁significance ▁of ▁the ▁site . ▁In ▁ 1 9 8 0 , ▁its ▁management ▁was ▁taken ▁over ▁by ▁the ▁NS W ▁National ▁Park s ▁and ▁Wild life ▁Service , ▁and ▁it ▁was ▁declared ▁as ▁Historic ▁Site . ▁In ▁ 2 0 1 1 , ▁on ▁the ▁ 5 0 th ▁anni versary ▁of ▁the ▁gaz ett al ▁of ▁the ▁South ▁Twe ed ▁He ads ▁reserve ▁( and ▁coinc ident ally ▁the ▁ 4 0 th ▁anni versary ▁of ▁the ▁appointment ▁of ▁Ne ville ▁Bon ner , ▁the ▁first ▁Ab original ▁sen ator ▁in ▁Australia , ▁who ▁was ▁born ▁on ▁nearby ▁Uk ere b agh ▁Island ), ▁the ▁Senate ▁of ▁Australia ▁acknowled ged ▁Margaret ▁Kay ' s ▁work ▁in ▁conser ving ▁Ab original ▁her itage , ▁at ▁a ▁time ▁when ▁that ▁was ▁rare . ▁ ▁Kay ▁also ▁collected ▁Ab original ▁arte fact s , ▁which ▁she ▁displayed ▁in ▁her ▁home ▁as ▁an ▁Ab original ▁museum . ▁Kay ▁herself ▁made ▁col oured ▁sand ▁art ▁in ▁bott les , ▁and ▁cro ch et ed , ▁se wed , ▁painted ▁and ▁drew . ▁Late ▁in ▁her ▁life , ▁she ▁took ▁part ▁in ▁the ▁opening ▁ceremony ▁of ▁the ▁Op al