Western Australian Consolidated Acts The non-extinguishment
principle applies to all category C and category D past acts.
Note: In the
NTA —
• “category C past act” is
defined in section 231 to mean the grant of a mining
lease;
•
“category D past act” is defined in
section 232 as a past act that is not in category A, B, or C;
and
•
the effect of the non-extinguishment principle is set out
in section 238.