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