(a) NHHBG funds may be used for the acquisition, new construction, reconstruction, or moderate or substantial rehabilitation of affordable housing for homeownership or rental, which may include:

(1) Real property acquisition;

(2) Acquisition of affordable housing;

(3) Financing acquisition of affordable housing by homebuyers through:

(i) Down payment assistance;

(ii) Closing costs assistance;

(iii) Direct lending; and

(iv) Interest subsidies or other financial assistance

(4) New construction of affordable housing;

(5) Reconstruction of affordable housing;

(6) Moderate rehabilitation of affordable housing, including but not limited to:

(i) Lead-based paint hazards elimination or reduction;

(ii) Improvements to provide physical accessibility for disabled persons; and

(iii) Energy-related improvements;

(7) Substantial rehabilitation of affordable housing, including but not limited to:

(i) Lead-based paint hazards elimination or reduction;

(ii) Improvements to provide physical accessibility for disabled persons; and

(iii) Energy-related improvements;

(8) Site improvement, including recreational areas and playgrounds for use by residents of affordable housing and on-site streets and sidewalks;

(9) The development and rehabilitation of utilities, necessary infrastructure, and utility services;

(10) Conversion;

(11) Demolition;

(12) Administration and planning; and

(13) Other related activities, such as environmental review and architectural and engineering plans for the affordable housing project.

(b) Multi-unit projects. NHHBG funds may be used to assist one or more housing units in a multi-unit project. Only the actual NHHBG eligible development costs of the assisted units may be charged to the NHHBG Program. If the assisted and unassisted units are not comparable, the actual costs may be determined based upon a method of cost allocation. If the assisted and unassisted units are comparable in terms of size, features, and number of bedrooms, the actual cost of the NHHBG-assisted units can be determined by pro-rating the total NHHBG eligible development costs of the project so that the proportion of the total development costs charged to the NHHBG Program does not exceed the proportion of the NHHBG-assisted units in the project.