Ko te whakarāpopototanga o te tukanga rewa penei:

• whiriwhiria ngā rauemi mata pēnei i te konganuku manganese, te kōka, te kōhatu kōhatu me ētahi atu rauemi mata, ka tukatuka i mua i a rātou; whakakīia te oumu ki te puranga me te whakaranu ōrite; whakarewahia ngā rauemi mata i ngā pāmahana teitei i roto i ngā oumu hiko, i ngā oumu pupuhi rānei, ka huri i ngā waikura manganese hei konganuku manganese i roto i te taiao whakaiti hei hanga koranu; whakatikatikahia te hanganga koranu me te tango i te whanariki i ngā koranu; wehea te rino para ka maka i ngā koranu rewa; ā, i muri i te whakamatao, ka tukuna ngā koranu ki te whakamātautau kounga hei whakatutuki i ngā paerewa. E aro ana te tukanga ki te whai huatanga o te pūngao me te tiaki taiao, me te whakauru i ngā hangarau matatau hei whakaiti i te parahanga me te whakapai ake i te whai huatanga.