According to the BrazilianLaw on Industrial Property (Law 9.279 from May 14th, 1996; See translation), Chapter IV, Article 124, Brazilian official symbols are Public Domain because they can be copied and reproduced without any permission from the Brazilian government or anyone else unless they are being copied or reproduced with foul intentions.
This coat of arms image should be recreated using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is already available, please upload it. After uploading an SVG, replace this template with template {{|new image name.svg}} in this image.