This is a list of Acts of the Parliament of Northern Ireland, from its first session in 1921 to suspension in 1972. The short titles for these Acts were distinguished from those passed by the Westminster parliament by the insertion of the bracketed words "Northern Ireland" between the word "Act" and the year. Thus Police Act (Northern Ireland) 1970 was an Act passed by the Parliament of Northern Ireland, whereas the Police (Northern Ireland) Act 1998 was passed at Westminster.