The authority under section 88(6) must—
(a) be in writing and be signed by the chief executive of the local government; and
(b) state the following—
(i) that the authority is issued under this Act;
(ii) the name of the person to whom it is issued;
(iii) the land to which the authority applies;
(iv) that the person has authority to enter the land;
(v) the purpose for which the land is being entered;
(vi) whether the person has authority to carry out any work required under an order;
(vii) the date, not more than 90 days from the date of the authority, on which it expires.