(1) No provisions of this title shall affect or impair the validity of any certificate that is in force on January 26, 1971, or the rights and privileges of the holders by virtue thereof, except that any certificates may be suspended or revoked for any of the causes and by the procedures provided by law.
(2) Any holder of an elementary school standard certificate issued prior to July 1, 1959, under the previous statute and in force on July 1, 1959, shall be eligible for renewal of such certificate in accordance with the policies of the board of public education until the holder qualifies for the class 2 standard certificate as provided in 20-4-106.
(3) Any holder of a class 5 certificate in force on June 30, 1966, or issued between July 1, 1966, and December 31, 1966, shall be eligible for renewal of such certificate in accordance with the policies of the board of public education until the holder qualifies for the class 2 standard certificate as provided in 20-4-106.