2. Immediately upon the filing by the County, or by any other body, public or private, or a condemnation action seeking property rights in the land described herein or any part thereof. 3. Ninety days after the date of death of a grantor. 4. Ten years from the date of this instrument; provided, however, that the temporary easement shall continue thereafter unless otherwise terminated as set out above or unless and until terminated by either party by the service upon the other party by certified mail of a written 90 day notice of termination to be effected by the recordation among the land records of Fairfax County of a properly executed deed of release and vacation of said temporary easement which stipulates that the above mentioned 90-day notice had been sent as required. V. Termination of the rights, title and interest of the County in the land herein described acquired under the provisions of the permanent easement shall occur, and only under, the following provisions: 1. By deed of release and vacation of this easement executed by the County, accepted by grantor or his successor in interest, and recorded as provided by law. 2. Immediately upon the filing by the County, or by any other body, public or private, of a condemnation action seeking property rights in the land described herein or any part thereof. VI. Future Density Determination If at any time the temporary easement is terminated as set out above and the 8.09917 acres subject to the permanent easement is included in any Deed of Subdivision and Dedication for the development of the 44.30980 acres previously subject to the temporary easement, the County of Fairfax, by its acceptance of this Deed of Easement agrees to include acreage of the permanent easement in the computation of the density to be permitted in the development of the acreage previously subject to the temporary easement. VII. Definitions of terms 1. "Grantor" shall be deemed to be singular or plural, male or female, as the context may require. 2. "Successor in interest" shall be deemed to be singular or plural, male or female, as the context may require; where an act is required to be performed or the instrument is required to be executed, this term shall be deemed to mean all of the successors to all of the interests of all of the grantors.