23 C.F.R. § 1275.7
(b) As soon as practicable after NHTSA and FHWA receive the notification described in paragraph (a) of this section, the Secretary will:
(c) Any funds transferred under paragraph (b)(1) of this section shall be—
(g)
(2) The obligation authority referred to in paragraph (g)(1) of this section shall be transferred from the obligation authority distributed for the fiscal year to the State for Federal-aid highways and highway safety construction programs, and the amount shall be determined by multiplying:
(ii) The ratio that: