Reading through various translations, the first part seems to say "don’t cut/gash your body in honor/memory/mourning of the dead, but most of the translations leave it somewhat ambiguous (at least to me) as to whether it means “don’t tattoo yourself in honor/memory/mourning of the dead” or just, “don’t tattoo yourself at all”. Also, it sounds as though cutting/gashing yourself for other reasons is isn’t breaking any rules.