Pursuant to delegation of authority contained in FPMR 101-47.308-4, as set forth in Sec. Sec. 644.400 through 644.443, the responsible DE may assign buildings or other improvements made available for disposal and not required for Federal purposes to HEW upon receipt of request therefore from the appropriate regional representative of that department for disposal for public health or educational purposes. Assignments will be effected by letter addressed as indicated in Sec. 644.483. Further, pursuant to delegation of authority the Department may disapprove within 30 days after notice from HEW, any transfer of property proposed to be made by that agency for such purpose. The DE will be guided by the policy set forth in Sec. Sec. 644.400 through 644.443 in regard to the delegation to disapprove transfers by HEW.