; and (2) housing that is severely distressed housing (as such term is defined in section 315). 305. Authorized activities (a) In general Amounts from a grant under this title may be used only for transformational programs and activities in accordance with a transformation plan approved under section 306 that will further the purposes of this title. (b) Required activities Each transformation plan submitted pursuant to section 306 and implemented by a grantee under this title shall include the following activities: (1) The transformation of housing through rehabilitation, preservation, or demolition and replacement of severely distressed housing projects, expansion of affordable housing opportunities, or any combination thereof, which may incorporate energy-efficient design principles. (2) The one-for-one replacement of any public and assisted housing units demolished or disposed of in accordance with the requirements under section 308. (3) Activities that promote economic self-sufficiency of residents of the revitalized housing and of the surrounding neighborhood. (4) Activities that preserve affordable housing in the neighborhood and other activities necessary to ensure that existing public and assisted housing residents have access to the benefits of the neighborhood transformation. (5) Activities that demonstrate that each resident of housing assisted by the grant who is displaced by the transformation plan and who wishes to return to the revitalized on-site housing in the neighborhood or to replacement housing outside of the neighborhood, can return, and shall be provided a preference in accordance with the program requirements under section 307. (6) Activities that meet the program requirements for replacement of housing units under section 308. (7) Activities that meet the fair housing program requirements under section 309(a) and the accessibility requirements under section 309(b). (8) Appropriate service coordination and supportive services. (9) Resident involvement, as described in section 307, in