Instruction and practice may be secured in one or more institutions approved by the board. Such institution or institutions with which the school is to be affiliated shall be surveyed by the executive secretary of the board, who shall submit a written report of the survey to the board. If, in the opinion of the board, the requirements for an accredited school to prepare practitioners of registered professional nursing are met, it shall approve the school as an accredited school. From time to time as deemed necessary by the board, it shall be the duty of the board, through its executive secretary, to survey all such schools. Written reports of such surveys shall be submitted to the board. If the board determines that any such accredited school is not maintaining the standards required by this article and by the board, notice thereof in writing specifying the defect or defects shall be immediately given to the school. A school which fails to correct these conditions to the satisfaction of the board within a reasonable time shall be removed from the list of accredited schools.