The Secretary shall, upon the request of an owner, apply the provisions of this section to any housing for which a loan reservation was made under section
1701q of title
12 before November 28, 1990, but for which no loan has been executed and recorded. In the absence of such a request, any housing identified under the preceding sentence shall continue to be subject to the provisions of section
1701q of title
12 as they were in effect when such assistance was made or reserved.