(a) A teacher or employee may not be assigned to a charter school unless the teacher or employee consents to the assignment.
(b) All provisions of an existing negotiated agreement or collective bargaining agreement applicable to a teacher or employee of a district apply to that teacher or employee if employed at a charter school in that district, unless the district and the bargaining unit representing the teacher or employee agree to an exemption.
(c) A teacher in a charter school shall be evaluated in an equivalent manner as all other teachers in the district, except that if there is no administrator assigned to the charter school, the local school board, with the agreement of the charter school, shall designate a school district administrator in that district to evaluate a teacher in a charter school.