A declaration of taking in the form of an order signed by the commissioner, or by a designee of the commissioner within the department, declaring that the real property, or interest in it, or an easement, is necessary for the public use of the state vests title in the state. However, a declaration of taking is not effective until eminent domain proceedings have been instituted in the proper court, and a copy of the declaration of taking has been recorded in the office of the recorder in the district where the land is located. The department shall pay from the appropriate fund into court the amount it considers represents a reasonable valuation for the land, easement, or materials taken.