of appropriations There is authorized to be appropriated funds to the extent and in such amounts as specifically provided in advance in appropriations acts for the purposes detailed in this subsection. (B) Availability in general Subject to subparagraph (A), the Director of National Intelligence shall make available to the Commission such amounts as the Commission may require for purposes of the activities of the Commission under this section. (C) Duration of availability Amounts made available to the Commission under subparagraph (B) shall remain available until expended or upon termination under paragraph (10)(B), whichever occurs first. (13) Congressional intelligence committees defined In this subsection, the term congressional intelligence committees means— (A) the Select Committee on Intelligence of the Senate