The 6 actions (Resol'Nare) to be a Mandalorian.

[projectsunfire]

There are six acts one needed to follow to be a Mandalorian, known as the Six Actions (Resol'Nare). They consisted of: wearing armor, speaking Mando'a, defending themselves and families, raising children as Mandalorians, helping the clan succeed and sustain itself, and when called to arms by the Mandalore, rally to his cause.
Source: starwars.wikia.com/wiki/Mandalorian