5.—(1) Subject to subsection (2), whenever a change is made or occurs in any of the particulars of the statement furnished by an employer under section 3, 4 or 6, the employer shall notify the employee in writing of the nature and date of the change as soon as may be thereafter, but not later than—

( a ) 1 month after the change takes effect, or

( b ) where the change is consequent on the employee being required to work outside the State for a period of more than 1 month, the time of the employee's departure.

(2) Subsection (1) does not apply in relation to a change occurring in provisions of statutes or instruments made under statute or of any other laws or of any administrative provisions or collective agreements referred to in the statement given under section 3 or 4.