(2) The authority may, by written notice (an
"investigation notice" ), require the person who has carried out, is carrying
out or is proposing to carry out the activity to—
(a) conduct or commission
an investigation (an
"environmental investigation" ) about the event or activity; and
(b) submit
an environmental report about the investigation to the authority.
(3) This
section does not apply if the administering authority requires an
environmental audit for the event or activity.
(4) In this section—
"activity" includes rehabilitation or remediation work.