From friend's experiences you do not have to live 2 years continuously in australia prior to age 67 to gain portability of the oap. You are only denied portability if you are deemed to be a "returning resident". If you spend 51% of the 2 years prior to age 67 in australia you will be deemed to be a resident for portability purposes. I know 1 fellow who spent 2 months overseas and 1 month in australia for the 2 years prior to applying for the oap. He was deemed to be a resident because he maintained a continuous connection to australia and was merely considered a frequent traveller.
