; (3) the term qualified carrier means a terrestrial telecommunications carrier that receives support from the Rural Digital Opportunity Fund under subpart J of part 54 of title 47, Code of Federal Regulations, or any successor regulations; and (4) the term Rural Digital Opportunity Fund support means support from the Rural Digital Opportunity Fund under subpart J of part 54 of title 47, Code of Federal Regulations, or any successor regulations. (b) Accelerating Broadband Connectivity Fund There is established in the Treasury of the United States a fund to be known as the Accelerating Broadband Connectivity Fund . (c) Availability of funds The Commission may use amounts in the Accelerating Broadband Connectivity Fund to provide support to qualified carriers in accordance with subsection (d). (d) Amount and use of funds (1) In general (A) Phase I support recipients The Commission shall make one-time funding offers to qualified carriers that receive Rural Digital Opportunity Fund support during Phase I, and that commit to meeting the conditions under paragraph (2), to accelerate the broadband deployment obligations assumed by those carriers with respect to that support. (B) Phase II support recipients The Commission shall use any amounts in the Accelerating Broadband Connectivity Fund that are not otherwise committed under subparagraph (A) to make one-time funding offers to qualified carriers that receive Rural Digital Opportunity Fund support during Phase II, and that commit to meeting the conditions under paragraph (2), to accelerate the broadband deployment obligations assumed by those carriers with respect to that support. (2) Conditions (A) In general A qualified carrier that receives amounts under paragraph (1) shall— (i) begin construction of the broadband network for which the amounts are awarded not later than 180 days after the date on which the award under paragraph (1) is authorized