Liquidated damages by employer

[SKU]

In the event you resign or get terminated (for the
reasons mentioned in the appointment letter) within twelve (12) months after the effective date of
your employment hereunder, you will be liable to pay a sum of equal to one (1) month’s basic salary
being a genuine pre-estimate of the damage and expenses incurred by the company in addition to
serving the stipulated notice period.

This is a penalty clause. Is it enforsable as per Singapore Employemnt Act?