usufruct

"The right of temporary posession, use, or enjoyment of the advantages of property belonging to another, so far as may be had without causing damage or prejudice to this."

hence also usufructuary, "One who has the temporary use and reaps the fruits or profits of an estate, benefice, office, etc., legally belonging to another or others; one who enjoys the usufruct of a property, etc.[;] One who has the use or enjoyment of something." (OED)

Done