I applied when she's 1 month old. Because we are going overseas. And if there's need to change if the ICA officer requested, then I do it. Because kids is every 5 years. Before 1 years old you do the free waiver, subsequently, you can change after that. For me no urgency to do it, until you want to travel or if you do not want to miss the waiver. Otherwise, you can wait. Furthermore, this waiver is not compulsory to do.
itsallabout_mytwokids