Any precise plan approval permit shall be null and void if it is not exercised within the time specified in the resolution approving such precise plan, or, if no time is so specified, if the same is not exercised within one year from the date the approval becomes final; provided, that if litigation is filed prior to the exercise of such rights, attacking the validity of such approval, the time for exercising such rights shall be automatically extended pending a final determination of such litigation. The granting body, upon good cause shown by the applicant, may extend the time limitations imposed by this chapter once, for a period of not to exceed one year, without a public hearing.
(1964 Code Appx. A § 9.70)