In any case, details of the directors will not be updated in the Registers of Adult workers, because they are not "workers" as per definition of the Factories Act. Instead details of the directors will be updated in the Register of Members as per Companies Act, 2013, even if they are working in the factory. Furthermore, requirement of maintaining Register of Adult Workers depends upon the state rules.
For Eg : In maharashtra, Register of Adult Workers need to be maintained on annual basis. That mean if any person is retired last year, or left the organisation last year will not be updated in the current year's Register.