communities, (vii) encouraging public-private partnerships, and (viii) any other project or activity designated by the Secretary. (4) Eligible organization For purposes of this subsection, the term eligible organization means an organization described in section 501(c)(3) and exempt from taxation under section 501(a). (5) Regulations The Secretary shall prescribe such regulations or other guidance as may be necessary to carry out this subsection. . (b) Effective date The amendment made by subsection (a) shall apply to periods after December 31, 2016.