These Rules, made under the Crop Production and Livestock Act, lay down certain requirements regarding the cultivation of wattle. The Rules prescribe the varieties of wattle that shall be grown. Other varieties of wattle may be grown where an inspector is satisfied: (a) that other varieties are grown for purposes other than the production of bark; and (b) that the bark of such other varieties will not be sold; and (c) that, if the bark of a specified variety is sold, it will be kept separate fro