(a) Every candidate for a nursing home administrator license shall be required to pass an examination, as determined by the board, for such license with a minimum grade determined by the board.

(b) The board shall determine the method of grading and shall apply the method uniformly to all candidates taking that examination.

(c) The board shall not disclose the percentage ratings of candidates by individual identity to any of its officers or employees responsible for determining the final grading of an examination until such determination has been made.