c. A person of Chinese nationality born outside Hong Kong before or after the establishment of the Hong Kong Special Administrative Region to a parent who, at the time of birth of that person, was a Chinese citizen falling within category (a) or (b).
A person's ROA by virtue of his being a permanent resident of the HKSAR under this category can only be exercised upon the establishment of his status as such a permanent resident by his holding of -
a valid travel document issued to him and of a valid certificate of entitlement also issued to him and affixed to such travel document;
a valid HKSAR passport issued to him; or
a valid permanent identity card issued to him.