(1) An authorised person may enter a place under section 518 without prior notice to any person.
(2) An authorised person must, as soon as practicable after entry to a workplace or suspected workplace, take all reasonable steps to notify the following persons of the entry and the purpose of the entry—(a) the person conducting a relevant business or undertaking at the workplace;(b) the person with management or control of the workplace.
(3) However, an authorised person is not required to notify any person if to do so would defeat the purpose for which the place was entered or cause unreasonable delay.
(4) In this section—
"relevant business or undertaking" means a business or undertaking in relation to which the authorised person is exercising the power of entry.