Wrong.All you assume is you have all the answers and others here dont
The answers are available, Festive doesnt want to find them
Here you go, took me 30 secs to find a comprehensive answer, fill yer boots:
We’ve already noted before that a range of government ministers and experts have explained the problems with GATT 24, including Bank of England governor Mark Carney, International Trade Secretary Liam Fox (a leading Brexit supporter), and trade experts such as Peter Ungphakorn. EU Trade Commissioner Cecilia Malmström has described the idea that Article 24 would prevent tariffs in a no deal scenario as “completely wrong”.
Since we last wrote about this topic, the Director General of the World Trade Organisation, Roberto Azevêdo, has also said in an interview with Prospect magazine: “Article XXIV of the GATT is simply the provision of global trade law under which free trade agreements and customs unions are concluded... If there is no agreement, then Article XXIV would not apply, and the standard WTO terms would.”
Mr. Hunt’s comments about the position of Geoffrey Cox, the Attorney General (the government’s chief legal adviser) and a supporter of Mr. Johnson, seem to stem from a Financial Times report on 23 June. It said that guidance from the Attorney General’s office in January said it would be a “prima facie breach of WTO law” for the UK to maintain zero tariffs for the EU whilst charging other countries import duties, which a “standstill” implies. Mr Cox did not comment on the report
https://fullfact.org/europe/gatt-nine-lives-article-24-again/