That's how I know it though perhaps the word 'offiziell' may not be correct except for subgroups. It would be played in a military burial (very slow by a single trumpet (as it say above), also quite often for other groups with uniforms.

If the person who has died did wear a uniform (police, fireman, military, Burschenschaft,...), more likely than not, this tune will be heard. If the person did not wear a uniform, the tune is not likely to be heard at the burial. At the burial of a female, I have never heard this tune yet though it would not be impossible.

Wolfgang