regnant

hallitsija- reigning Reigning, ruling; currently holding power. (defdate)
1910, A. M. Fairbairn, Studies in Religion and Theology, http://books.google.com/books?id=2vsQAAAAIAAJ&pg=RA1-PA99&dq=regnant page 99

The people are now the State, their will is the regnant will, and that will has this characteristic — it loves principles, it hates compromises; and the principles it loves must be regulative, fit to be applied to the work and guidance of life.

The doors of his temples were kept open in time of war, the time in which the ideas of contradiction and conflict are most naturally regnant.

Here are two sovereigns in the land, a regnant and a claimant - that is enough of one good thing - but if any one wants more, he may find a king in every peelhouse in the country; so if we lack government, it is not for lack of governors.