31 C.F.R. § 35.6
(b) Responding to the public health emergency or its negative economic impacts. A recipient may use funds to respond to the public health emergency or its negative economic impacts, including for one or more of the following purposes:
(1) COVID-19 response and prevention. Expenditures for the mitigation and prevention of COVID-19, including:
(12) Disproportionately impacted populations and communities. A program, service, or other assistance that is provided in a qualified census tract, that is provided to households and populations living in a qualified census tract, that is provided by a Tribal government, or that is provided to other households, businesses, or populations disproportionately impacted by the COVID-19 public health emergency, such as:
(i) Programs or services that facilitate access to health and social services, including:
(ii) Programs or services that address housing insecurity, lack of affordable housing, or homelessness, including:
(iii) Programs or services that address or mitigate the impacts of the COVID-19 public health emergency on education, including:
(iv) Programs or services that address or mitigate the impacts of the COVID-19 public health emergency on childhood health or welfare, including:
(d) Providing government services. For the provision of government services to the extent of a reduction in the recipient's general revenue, calculated according to paragraphs (d)(1) and (2) of this section.
(2) Calculation. A reduction in a recipient's general revenue equals:

Where: Base Year Revenue is the recipient's general revenue for the most recent full fiscal year prior to the COVD-19 public health emergency; Growth Adjustment is equal to the greater of 4.1 percent (or 0.041) and the recipient's average annual revenue growth over the three full fiscal years prior to the COVID-19 public health emergency. n equals the number of months elapsed from the end of the base year to the calculation date. Actual General Revenue is a recipient's actual general revenue collected during 12-month period ending on each calculation date; Subscript t denotes the specific calculation date.
(e) To make necessary investments in infrastructure. A recipient may use funds to make investments in:
(2) Broadband. Broadband infrastructure that is designed to provide service to unserved or underserved households and businesses and that is designed to, upon completion:
(ii) In cases where it is not practicable, because of the excessive cost of the project or geography or topography of the area to be served by the project, to provide service meeting the standards set forth in paragraph (e)(2)(i) of this section: