Sentence:  In order to <WSD>fossick</WSD> you must first obtain a <WSD>fossicking</WSD> permit (free). They are available from the tourist offices in Darwin and Alice Springs, or Gemtree ... in the Harts Range. Permission to <WSD>fossick</WSD> on freehold land and mineral leases must be obtained from the owner or leaseholder. 
Meaning of the word marked with <WSD> tags:  To search for gems, gold, etc., on the surface or in abandoned workings.