File:Flagofbrazil.jpg

Licensing/Copyright status
Brazilian law prohibits use of official symbols where the intent or result is to mislead or profit from the work:

Reproducing or imitating, in whole or in part and in a way that may induce to error or confusion, coats of arms, escutcheons, or national, foreign or international official badges, without the necessary authorization, in a mark, title of establishment, trade name, insignia or advertising sign, or using such reproductions or imitations for economic purposes.
 * Chapter 4, Article 191 of Law No. 9.279, of 14 May 1996 that Regulates Rights and Obligations Relating to Industrial Property: official version in Portuguese; English translation

As simple reproduction for non-commercial purposes is not outlawed, and as the work is a public symbol, it is assumed that it is acceptable to use the design here as long as derivative works are not created, nor any attempt made to profit from the image.