The cabildo was formed by members of the Criollo oligarchy, both revolutionaries and royalists. The Cabildo opted to create a Junta Suprema (Supreme Governing Committee) with Viceroy Amar y Borbón as president and Pey as vice president. Amar was sworn in during the early hours of the next day.
A group of Criollo leaders, including both rebels and loyalists, formed the cabildo. They decided to set up a Junta Suprema (Supreme Governing Committee) with Viceroy Amar y Borbón as head and Pey as deputy. The next morning, at first light, Amar took office.