4.2.2.1. Ownership Interests (the Undivided Fee).A property with multiple ownership interests or estates—such as lessor and lessee, life tenant and the holder of the remainder, or mortgagor and mortgagee—must be valued as a whole, embracing all of the rights, estates, and interests of all who may claim, and as if in one ownership.238 For example, in an acquisition of property in fee simple absolute, the property must be appraised as an undivided fee.239 Similarly, in acquisitions of less-than-fee interests, the interests being appraised must be valued as if under single ownership.240 The market value of the whole is later apportioned among “the respective interest holders . . . either by contract or judicial intervention.”241 This is because just compensation is for the property itself, not the various ownership interests; thus, “the appraised value of the property represents the whole fee.”242 This aspect of the unit rule ensures the public is not charged twice in federal acquisitions.243