; (ii) provide input regarding the services and programming offered by such social workers and interns; and (iii) adhere to the American Library Association’s code of ethics; and (B) may designate members of the library staff to serve as a preceptor or library task supervisor for such interns. (4) Supplementary grants Subject to the availability of appropriations, an institution of higher education that receives a grant under this section may apply— (A) to the Secretary for a supplementary grant which, if received by such institution, shall be used in accordance with the requirements of this section; or (B) to the Secretary for additional funds to support the maintenance of a program or department established though the program under this section. 2. National technical assistance center (a) In general The Secretary Education, in coordination with the Director of the Institute of Museum and Library Services and through the solicitation of feedback from relevant stakeholders, shall establish an evaluation, documentation, dissemination, and technical assistance resource center to provide appropriate information, training, and technical assistance to States, political subdivisions of States, federally recognized Indian Tribes, tribal organizations, institutions of higher education, State and local educational agencies, and individual students and educators with respect to— (1) hiring and retaining social workers in libraries; and (2) carrying out programs to facilitate the placement of social workers in libraries on a temporary or permanent basis. (b) Responsibilities of the center The center established under subsection (a) shall conduct activities for the purpose of— (1) developing and continuing statewide or tribal strategies for improving the effectiveness of the social work and library workforce