Where a validity challenge is sustained by the Board pursuant to this section or the court acts finally on appeal from denial of a curative amendment proposal or a validity challenge, and the proposal or challenge so approved requires a further application for subdivision or land development, the developer shall have two years from the date of such approval to file an application for preliminary or tentative approval subject to the Monaca Borough Subdivision and Land Development Ordinance, as amended. Within the two-year period, no subsequent change or amendment in the zoning, subdivision or other governing ordinance or plan shall be applied in any manner which adversely affects the rights of the applicant sustained in the validity challenge. Upon the filing of a preliminary or tentative plan, the provisions of Section 508(4) of the Pennsylvania Municipalities Planning Code (Act 247, as amended) shall apply. Where the validity challenge is approved but does not require further application under the Monaca Borough Subdivision and Land Development Ordinance, as amended, the developer shall have one year within which to file for a building permit. Within the one-year period, no subsequent change or amendment in the zoning, subdivision or other governing ordinance or plan shall be applied in any manner which adversely affects the rights of the applicant as granted in the sustained validity challenge. During these protected periods, the court shall retain or assume jurisdiction for the purpose of awarding such supplemental relief as may be necessary.