(1) The validity of an order made under this Act (other than an order made by the Tribunal) or any other document made or prepared under this Act is not affected by an error in it unless—
(a) the error relates to the grounds on which the order or document was made and proper grounds for making the order or document do not exist; or
(b) as a result of the error, the order or document does not comply with a mandatory requirement of this Act relating to the making of the order or document.
(2) If an error in an order or other document does not affect the validity of the order or document, the person who made the order or document may correct the error.