The National Health Insurance Act stipulates that foreign nationals who with Valid Alien Resident Certificate or Resident certificate for the Taiwan area (including those from Hong Kong, Macau and China) must be registered in the National Health Insurance program upon living in Taiwan for 6 months (6 months of continuous residence in Taiwan or with one trip abroad not exceeding 30 days when the actual residency period of 6 months is reached after the days abroad have been deducted). But those people who get work permits with ARC must join the National Health Insurance program by their employer starting the day they are employed.