(a) Except as otherwise provided, before the 1997-1998 school year, whoever serves in the department as a teacher without holding an unrevoked certificate issued under sections 302A-602 to 302A-639, and 302A-701, shall be fined not more than $25.
(b) Beginning with the 1997-1998 school year, whoever serves in the department as a teacher, paid under the salary schedule contained in the unit 5 collective bargaining agreement, without holding an unrevoked or unsuspended license or credential issued under sections 302A-801 to 302A-808, shall be fined not more than $500.
(c) Beginning with the 2002-2003 school year, an individual paid under the salary schedule contained in the unit 5 collective bargaining agreement, without holding an unrevoked license issued under sections 302A-801 to 302A-808, shall be fined not more than $500.
(d) Beginning with the 2002-2003 school year, emergency hires shall not be subject to this penalty.