generally, all conservation units in brazil allow for public access, exception made for biological reserves and ecological stations that require a special authorization, or reserves located inside military areas such as the ilha da marambaia.

different reserves are administered by different government institutions, setting rules and limitations according to each individual set of programs and requirements.

for the biological reserves and all state ecological stations  located in rio de janeiro, theinstitudo estadual do ambiente - inea, posts on this page guidelines and instructions on how to get access to these protected areas, including a link to the document to be filled out and submitted to request access (documentos para solicitação de autorização de pesquisa).