the thirty-year rule
noun/ðə ˌθɜːti ˈjɪə ruːl/, /ðə ˌθɜːti ˈjɜː ruːl/
/ðə ˌθɜːrti ˈjɪr ruːl/
[singular]- a British government rule which prevented certain official documents from being made public until a period of thirty years had passed. It was replaced when the Freedom of Information Act was passed in 2005.
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation:
the thirty-year rule