The Secretary shall notify each applicant, not later than 6 months after the date of the submission of the application, whether the application is approved or not approved. The Secretary may approve the application for an implementation grant with a statement that the application for the section
8 [
42 U.S.C.
1437f] assistance for replacement housing and for residents of the project not purchasing units is conditionally approved, subject to the availability of appropriations in subsequent fiscal years.