dead letter
Noun
Meaning
the state of something that has outlived its relevance
mail that can neither be delivered nor returned
Source: WordNetAlternative names
dead-letter
Synonyms
Hypernyms
Examples
Aftermath The constitution of 1919 was never formally repealed, but the Enabling Act meant that it was a dead letter.
“The supposed rule is a dead letter in speech, and in most kinds of writing,” Butterfield writes.
Dead letter The phrase "dead letter" refers to legislation that has not been revoked, but that has become inapplicable or obsolete or is no longer enforced.
His successful amendment that the county need only fund those schools where the buildings were in good repair served to make the Act a dead letter in Wales, where the counties were able to show that most Church of England schools were in poor repair.
If he or she is also chief executive, he or she can thus politically control the necessary executive measures without which a proclaimed law can remain dead letter, sometimes for years or even forever.
It was a dead letter.