pass laws       
noun [ plural ] uk/ˈpɑːs ˌlɔːz/ us/ˈpæs ˌlɔːz/
 (尤指南非在种族隔离时期推行的)通行证法
laws controlling where people can live, work, and travel inside a country, used especially in the past under the system of apartheid (= racial separation) in South Africa
  Introduced in 1923, the pass laws were designed by the South African government to prevent freedom of movement of non-whites.  通行证法是南非政府于1923年推出的,目的是限制非白人的行动自由。 
 Critics have described ID cards as the modern equivalent of "pass laws". 批评者认为身份证相当于现代的 "通行证法"。 
 - More examples
 - In the 1950s pass laws were extended to African women as well as men.
 - It was under Botha's leadership that the South African state abolished the pass laws which restricted the movement of Africans in the country.
 - He compares the proposal to introduce ID cards with South Africa's infamous pass laws under apartheid.