The phrase "declared using" is correct and usable in written English.
You can use it when you want to emphasize that something was stated or announced using a certain method or means. For example, "The news was declared using the television."
One might have argued that a kamikaze prime minister could have triggered article 50 immediately after the referendum result was declared, using his prerogative powers.
"We believe the L.T.T.E.'s campaign to get a cease-fire declared using international pressure and exploiting the so-called humanitarian crisis is purely to gain a breathing space," Mr. Kohona said.
"In no way, shape, or form do I hide the fact that I believe in Israel open kimono!" he declared, using one of his favorite expressions to somewhat bizarre effect.
"Terrorist attacks are not caused by the use of strength, they are invited by the perception of weakness," he declared, using a line that has become standard in his speeches over the past several weeks.
"These bloodsuckers who attack the Palestinians, these warmongers, the descendants of apes and pigs," Mr. Morsi declared, using a slur for Jews that is familiar across the Muslim world.
"China has suffered for a long time under the hukou system!" the editorials declared, using the Chinese term for the residency permits that tie government benefits to a person's registered hometown.
The Turkish government has declared used books "unsanitary".
"Make your bubbe proud," one card declares, using the Yiddish word for grandmother.
"I feel alright," Bonzai declares, using one of those gratifyingly blank pop phrases that have been worn smooth by dozens or hundreds of songs, leaving only some familiar syllables and a faint hint of a feeling.
Overall, 30 NICUs (79%) declare using fluconazole for prophylaxis.
Another ad, squeezed between billboards for banks and insurance companies, shows an offshore oil rig and declares, "Use your cellphone to drill the oil industry".
