415(c) of the Energy Conservation and Production Act ( 42 U.S.C. 6865(c) ) is amended to read as follows: (2) Dwelling units weatherized (including dwelling units partially weatherized) under this part, or under other Federal programs (in this paragraph referred to as previous weatherization ), may not receive further financial assistance for weatherization under this part until the date that is 15 years after the date such previous weatherization was completed. This paragraph does not preclude dwelling units that have received previous weatherization from receiving assistance and services (including the provision of information and education to assist with energy management and evaluation of the effectiveness of installed weatherization materials) other than weatherization under this part or under other Federal programs, or from receiving non-Federal assistance for weatherization. . (i) Annual report Section 421 of the Energy Conservation and Production Act ( 42 U.S.C. 6871 ) is amended by inserting the number of multifamily buildings in which individual dwelling units were weatherized during the previous year, the number of individual dwelling units in multifamily buildings weatherized during the previous year, after the average size of the dwellings being weatherized, . (j) Report on waivers Not later than 180 days after the date of enactment of this Act, the Secretary of Energy shall submit to Congress a report on the status of any request made after September 30, 2010, for a waiver of any requirement under section 200.313 of title 2, Code of Federal Regulations, as such requirement applies with respect to the weatherization assistance program under part A of title IV of the Energy Conservation and Production Act ( 42 U.S.C. 6861 et seq.), including a description of any such waiver that has been granted and any such request for a waiver that has been considered but not granted. 402. LIHEAP authorization Section 2602 of the Low-Income Home Energy Assistance Act of 1981 ( 42 U.S.C. 8621 ) is amended— (1) in