Section 246(2)--
omit, insert--
'(2) If the exceeding of the trigger threshold was caused by a combination of any of the following activities the existing water Act bore is unduly affected by each of the activities--
(a) the taking of water necessarily taken as part of petroleum production under 1 or more 1923 Act petroleum tenures;
(b) the exercise, under this Act, of underground water rights for 1 or more 2004 Act petroleum tenures.'.