(1) Subject to this section, where an employee has given a notice under section 8(1) to his or her employer and the employer is satisfied that the taking of parental leave at the time specified in the notice would have a substantial adverse effect on the operation of his or her business, profession or occupation by reason of seasonal variations in the volume of the work concerned, the unavailability of a person to carry out the duties of the employee in the employment, the nature of those duties, the number of employees in the employment or the number thereof whose periods, or parts of whose periods, of parental leave will fall within the period specified in the said notice or any other relevant matters, the employer may, by notice in writing given to the employee not later than 4 weeks before the intended commencement of the leave, postpone the commencement of the leave to such time not later than 6 months after the date of commencement specified in the relevant notice under section 8(1) as may be agreed upon by the employer and the employee.

(2) Before giving a notice under this section to an employee, an employer shall consult with the employee in relation to the proposed postponement of parental leave.