Definition of thirty-year rule in English:

Share this entry

thirty-year rule


A rule that public records may be open to inspection after a lapse of thirty years.
Example sentences
  • The role played by the British government during this critical period of the Cold War was widely ignored until the opening of the British archives for the late 1950s and early 1960s, under the thirty-year rule.
  • Files recently released to the National Archives under the thirty-year rule confirm an increased emphasis by MI5's F Branch on industrial and trade union matters.
  • The annual release of cabinet papers under the thirty-year rule has been pushed off the front pages by the disaster.

For editors and proofreaders

Line breaks: thirty-year rule

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.