The July 1960 Somali union was legally ratified retroactively seven months later.

Evidence

There is no doubt that on the first day of July a full and lawful union was formed by the will of the people of the two territories through their elected representatives. However, the legal formalities had not been completed in time … [and] the matter was clarified seven months later by the adoption of the new Act of Union with retroactive effect as from July 1, 1960 for the whole of the Republic. — Abdi Ismail Samatar, Africa’s First Democrats, 529