(i) Each person nominated for appointment to the Board shall be—
eminent in a field of science or engineering, including environmental sciences; and
selected solely on the basis of established records of distinguished service.
(iii) No person shall be nominated for appointment to the Board who is an employee of—
Any vacancy on the Board shall be filled by the nomination and appointment process described in paragraphs (1) and (3).
Members of the Board shall be appointed for terms of 4 years, each such term to commence 120 days after December 22, 1987, except that of the 11 members first appointed to the Board, 5 shall serve for 2 years and 6 shall serve for 4 years, to be designated by the President at the time of appointment.