The Director of Public Prosecutions, José Manuel Maza, made a brief public statement on Monday morning to announce his office is filing accusations against the former Catalan government and the Speaker's Committee of the Catalan Parliament.
Mr. Maza said the accusations would be for rebellion, sedition and misuse of public funds.
Copies of the accusations released to the media shortly afterwards show there are 20 accused in total: all 14 former members of former Catalan government and six members of the Speaker's Committee in the dissolved Catalan Parliament.
All 20 are to be accused of the same three crimes initially, in two different courts.
The accusations against the members of the Speaker's Committee will be filed before the Supreme Court, given they still enjoy special legal privilege as members of the regional parliament's standing committee.
The Catalan Parliament has been dissolved, so a standing committee headed by the Speaker, Carme Forcadell, still exists until the new elections on December 21.
The Speaker's Committee accusations include one former member of the committee, Lluis Corominas (Junts Pel Sí), who held the Deputy Speaker's position until July 2017.
The current Ciudadanos and Catalan Socialist Party (PSC) members, José María Espejo-Saavedra Conesa and David Pérez Ibáñez, will not be accused of any crimes.
The accusations against the former members of the Catalan government—including Carles Puigdemont and Oriol Junqueras—will be filed with the National High Court in Madrid.
All 14 former members of that government—including Santi Vila, who resigned as regional business minister before the vote—will be accused of the three major crimes.
After being sacked by Mariano Rajoy on Friday, the former regional ministers no longer enjoy the special legal privilege afforded in Spain to politicians in office.
The accusations stretched to 118 pages.
Mr. Maza said his office would consider any preliminary measures—which might include prison on remand—after the investigating judges had taken the first statements from the accused.
All three charges announced on Monday are considered to be serious under the Spanish Criminal Code 1995, meaning a prosecutor's request to imprison those accused on remand is not unlikely.