Split and simplify the following sentence while retaining its full meaning: On a unitary board , one way to ensure this is that the roles of chairman and chief executive are separate; in the case of unitary and dual boards , one option may be that the chief executive does not immediately become the chairman of the ( supervisory ) board .
 Simplified version:
In a unified management body ( board of directors ) one of the possible ways of ensuring this is that the duties of the chairman and the general manager responsible for the management are separated from one another . Another option could be that the general director responsible for the management or ( in the two-tier system ) the chairman of the board does not immediately take over the post of chairman of the board of directors / supervisory board .