Randall School development project tax exemption.

The real property described as Lot 801, Square 643S, known as the Randall School development project, owned by the Trustees of the Corcoran Gallery of Art, a nonprofit corporation, shall be exempt from the tax imposed by Chapter 8 of this title , beginning October 1, 2008, and for so long as the Trustees of the Corcoran Gallery of Art own the real property; provided, that the exemption shall cease once a certificate of occupancy issues for any part of the Randall School development project. The exemption shall be in addition to, and not in lieu of, any other tax relief or assistance from any other source applicable to the Randall School development project.