by the Director on the date of enactment of this Act may continue to receive support for a period of 4 years beginning on the date of establishment of that center. (C) Reapplication After the end of the period described in subparagraph (A) or (B), as applicable, a recipient of an award may reapply for selection on a competitive, merit-reviewed basis. (D) Termination Consistent with the existing authorities of the Department, the Director may terminate an underperforming center for cause during the performance period. (4) No funding for construction No funding provided pursuant to this subsection may be used for the construction of new buildings or facilities. (b) Basic energy sciences user facilities (1) In general The Director shall carry out a program for the development, construction, operation, and maintenance of national user facilities. (2) Requirements To the maximum extent practicable, the national user facilities developed, constructed, operated, or maintained under paragraph (1) shall serve the needs of the Department, industry, the academic community, and other relevant entities to create and examine materials and chemical processes for the purpose of improving the competitiveness of the United States. (3) Included facilities The national user facilities developed, constructed, operated, or maintained under paragraph (1) shall include— (A) x-ray light sources