You absolutely refuse to submit to, or even acknowledge the legitimacy of, any rule, custom, law or authority above your own, unless that authority is at least as powerful as a specific instruction from the Accursed himself. Your ability to operate within the context of any organization you are not unequivocally in charge of is utterly crippled. Diplomacy is a laughable dream.
Enemies that are aware of this can provoke you via reverse psychology, though this can only cause you to attack them - you aren't compelled to do the opposite of whatever they order. This Curse comes pre-mitigated in that it does not affect the Accursed, but is very difficult to mitigate further.
It's inadvisable to take this alongside any Brand effect if you intend to ever work with others. Example:
You request a subordinate do something for you -> They refuse until you collect 20 bear pelts -> You refuse to acknowledge the Brand's legitimacy, as it is not greater than the Accursed -> You are unable to ever get your 'subordinate' to do anything