Brazil — Força Aérea Brasileira / Arquivo Nacional
Brazil's Força Aérea Brasileira (FAB) ran a continuous UAP intake from 1952 through the OVNI declassification programme of 2005–2016. Roughly 4,500 documents from FAB and the I, IV, V, VI Comandos Aéreos Regionais have been transferred to the Arquivo Nacional across five tranches (March 2008 – December 2016) and are publicly accessible under the Lei de Acesso à Informação.
FAB SIOANI (1969–1980)
The Sistema de Investigação de Objetos Aéreos Não Identificados was the FAB's internal UAP reporting and investigation system, modelled in part on the U.S. Project Blue Book. Active 1969 until late 1980 when administrative funding was withdrawn. SIOANI records are core to the OVNI tranches.
Operação Prato — the high-water mark
Operação Prato (Sep 1977 – Jan 1978) was the largest, longest, and most-thoroughly documented military UAP investigation in South American history. 500+ pages of field reports, 16 mm film, photographic stills, and 80+ witness depositions led by Capt. Hollanda Lima.
FAB Notimp 250 (2013) — institutional formalisation
On 8 September 2013 the FAB issued Notimp 250, a formal directive establishing the procedure for any citizen to submit a UAP report to Comando da Aeronáutica (COMAER). The directive cites Operação Prato as institutional precedent and routes new reports to the Arquivo Nacional.
Verbatim — FAB statement on the declassification programme
"Em cumprimento à Lei de Acesso à Informação e visando maior transparência, o Comando da Aeronáutica transfere ao Arquivo Nacional os documentos relativos a observações de objetos aéreos não identificados, possibilitando o livre acesso pelo público em geral."
— Comando da Aeronáutica, March 2008