The status and international recognition of the ROC passport is complicated due to the political status of Taiwan. The Nationality Law of the Republic of China considers not only residents of Taiwan, Penghu, Kinmen, and Matsu, but eligible overseas Chinese and Chinese residents of Mainland China, Hong Kong, and Macau to be nationals of the Republic of China. It is worth noting that the vast majority of Chinese-descent residents in Hong Kong, Macau or Mainland China are also nationals of the People's Republic of China (PRC) and do not hold any identification documents issued by the ROC. Individuals in the latter two categories may be eligible for a ROC passport under certain conditions, but do not have household registration in Taiwan (i.e. they are "nationals without household registration", or "NWOHR"), and thus do not enjoy the right of abode in Taiwan. Countries granting visa-free privileges to Taiwan passport holders often require a Taiwanese National ID number imprinted on the passport's biodata page, which signifies the holder's right of abode in Taiwan.