; and (2) may not be used to replace any equipment purchased on or after August 14, 2018. (c) Grant eligibility (1) In general A communications provider with not more than 6,000,000 customers shall be eligible to receive a grant under subsection (a). (2) Definition of customer For purposes of paragraph (1), the term customer , with respect to a communications provider, means the United States customers of— (A) the communications provider; or (B) any parent, subsidiary, or affiliate of the communications provider. (d) Borrowing authority (1) In general Prior to the deposit of funds into the Supply Chain Security Trust Fund, the Commission may borrow from the Treasury such sums as may be necessary, but not to exceed the amount specified in section 6(b)(1), to implement this section. (2) Reimbursement The Commission shall reimburse the Treasury for any amounts borrowed under paragraph (1), without interest, from funds deposited into the Supply Chain Security Trust Fund. 6. Supply Chain Security Trust Fund (a) Establishment There is established in the Treasury of the United States a trust fund to be known as the Supply Chain Security Trust Fund . (b) Use of Fund As amounts are deposited into the Supply Chain Security Trust Fund, such amounts shall be used to make the following deposits or payments: (1) Repayment of amount borrowed for equipment replacement An amount not to exceed $700,000,000 shall be available to the Commission to reimburse the general fund of the Treasury for any amounts borrowed under section 5. (2) Equipment replacement $700,000,000, reduced by the amount borrowed under section 5, shall be available to the Commission to carry out that section. (c) Deposits into Fund Section 309(j)(8) of the Communications Act of 1934 ( 47 U.S.C. 309(j)(8) ) is amended— (1) in subparagraph (A), by striking and (G) and inserting (G), and (H) ; (2) in subparagraph (C)(i), by striking and (G) and inserting (G), and (H)