; and (B) such sums as may be appropriated to supplement the Fund. (2) Authorization of appropriations There are authorized to be appropriated to the Fund such sums as are necessary to carry out this subtitle. (3) Expenditures from the fund Amounts in the Fund shall be available to the Chief Executive for obligation without fiscal year limitation, to remain available until expended. (f) Lending, financing, expenditures (1) In general The Bank shall establish a program to provide, on a competitive basis loans, loan guarantees or credit buy downs from the Fund, as the Bank determines appropriate, solely to provide capitalization to an Eligible Clean Energy Financing Institution for the establishment or continuing operation of that entity. (2) Requirements The Bank may only provide loans, loan guarantees or credit buy downs under paragraph (1) if: (A) Application The applicant submits an application for loans, loan guarantees or credit buy downs in accordance with application criteria established by the Bank. (B) Eligible clean energy financing institutions An entity is eligible to receive loans, loan guarantees or credit buy downs under this section only if it— (i) meets the definition of Eligible Clean Energy Financing Institution; (ii) uses the funding from the Bank solely for the purposes described in this section