I, the copyright holder of this work, hereby publish it under the following licenses:
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.
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In short: you are free to distribute and modify the file as long as you attribute its author(s) or licensor(s).