In 1767, the northern boundary was moved to 32°28' north latitude (from the current location of Vicksburg, Mississippi, east to the Chattahoochee River).

[12][13][14] The city of New Orleans (today's French Quarter), was rebuilt with more fire-resistant buildings of brick, plaster, heavy masonry, ceramic tiled roofs, and courtyards.

In 1786, Miró enacted the Tignon law, which required Creole of color, Black, and indigenous women to had to wear a scarf or other head covering.

Although intended to limit these women and to restrict their fashion choices, the policy lead to a tradition of wearing elaborate tignons.

Charles Gayarré wrote the following account: "The reverend Capuchin, Antonio de Sedella, who had lately arrived in the province, wrote to the Governor to inform him that he, the holy father, had been appointed Commissary of the Inquisition; that in a letter of the 5th of December last, from the proper authority, this intelligence had been communicated to him, and that he had been requested to discharge his functions with the most exact fidelity and zeal, and in conformity with the royal will.

Wherefore, after having made his investigations with the utmost secrecy and precaution, he notified Mirò that, in order to carry, as he was commanded, his instructions into perfect execution in all their parts, he might soon, at some late hour of the night, deem it necessary to require some guards to assist him in his operations.Not many hours had elapsed since the reception of this communication by the Governor, when night came, and the representative of the Holy Inquisition was quietly reposing in bed, when he was roused from his sleep by a heavy knocking.

Thinking that they had come to obey his commands, in consequence of his letter to the Governor, he said: 'My friends, I thank you and his Excellency for the readiness of this compliance with my request.

— 'I dare obey orders,' replied the undaunted officer, and the Reverend Father Antonio de Sedella was instantly carried on board of a vessel, which sailed the next day for Cádiz.

"[20]This was an instance of the conflict within the central government at Madrid and also between it and the colonial governors: Miró's policy, approved by the Crown, had been to strengthen Louisiana against the United States and other powers by encouraging settlement;[21] this included requiring public practice of Catholicism, but ignoring private worship.