Diarchical

The principle of joint responsibility, however, did not develop under the diarchical system except in cases where a motion of no confidence in a ministry as a whole was carried in a Legislative Council.

Source: wiktionary

S.G. Ikoku also called for a diarchical political arrangement in his book, Nigeria's Fourth Coup d'etat: Options for Modern Statehood.

Source: wiktionary

Sometimes people seem to read them as suggesting that God gave politics its own place, the one it occupies in their diarchical scheme, and that it should keep to that place.

Source: wiktionary