> More like Spain constitution doesn't have an article detailing exit process. > Meanwhile USSR constitution had such article. Which was used by Lithuania when

> More like Spain constitution doesn't have an article detailing exit process. > Meanwhile USSR constitution had such article. Which was used by Lithuania when declaring independence. Source? I can't find any article detailing an exit process in the 1977 USSR constitution. Only at the beginning it says that the USSR is a voluntary union, but that's far from saying it details an exit process.