Western Australian Consolidated Regulations Where treatment of
premises by spraying is carried out pursuant to the provisions of the Act, or
these regulations, no person shall —
(a) do
anything that an authorised person has specified in writing as being likely
would adversely affect the result of the spraying; or
(b)
unless an authorised person has, in writing, authorised the person so to do,
within 48 hours after the spraying do anything whether by watering, digging
in, top-dressing or otherwise, that would adversely affect the result of the
spraying.