Yup the elder Marcos authorized its seizure.For those who have audio problems like me, with the X video on Kishore Mahbubani, there is a longer version on Youtube.
Watch out for "Who started this process(claiming islands)" at 8:10
From my memory, there was a big hoo ha when Malaysia started it.
Not sure if it preceded the Philippines also joining in the theft of islands when China was weak.
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In 1971, the Philippines took the opportunity to seize the island from the Republic of China (Taiwan) after the latter left the island due to an oncoming typhoon.
In 1974, Cloma "ceded" his rights over the islands for one peso, after being imprisoned by for "impersonating a military officer by being called an "admiral" while wearing a uniform of the Freedomland Navy. In the same year, Cloma renamed his territory to Kingdom of Colonia St. John and claimed that the cessation of his territory to the Philippine government was invalid as it was made under duress.