I'm sorry but Dharma in its original context, that being India, is far more a broad term than simply a religious one. For example the conduct of the corporate form in Ancient, and Medieval India was often defined by certain publicly stated terms that the corporation/guild and its members had to follow, this was called "Sreni Dharma" (Sreni being the guild/corporation, and Dharma being the terms it must conduct itself by).

So Dharma is a very broad term, and quite apt in this case.