(1) In granting a permission, the Authority may include in the permission a condition that allows the holder to give a person written authority to carry out any activity that may be lawfully carried out in accordance with the permission for such period as is specified in the authority.
(2) The holder of the permission may give such an authority, unless doing so would contravene another condition of the permission.
(3) If the carrying out of an activity by a person is authorised by an authority under a permission:
(a) the permission is, for the purposes of this instrument, taken to authorise the person to carry out that activity, subject to any conditions set out in the permission that relate to the carrying out of that activity; and
(b) the permission holder remains responsible for any activity carried out under the authority; and
(c) the giving of the authority does not prevent the carrying out of any activity by the permission holder at any time that the person is not carrying out the activity; and
(d) the permission is taken not to authorise the permission holder to carry out the activity at the same time as the person.