As used in the Historic Landscape Act:
A. "board" means the board of trustees of the historic landscape trust;
B. "historic landscape" means a historic manmade or cultural landscape:
(1) that is limited in scope;
(2) generally comprising a plaza, square, park, garden, terrace, streetscape, estate, grounds of a building or other open space designed formally or informally; and
(3) that has contributed to the cultural history of its time; and
C. "trust" means the historic landscape trust created by the Historic Landscape Act.