The correct answer is: A. 10 days
A staff is absent for 10 days from duty fresh declaration must be obtained. This is because the employer needs to know that the staff is still employed and that they are not taking an extended leave of absence. If the staff does not return to work after 10 days, the employer may need to start the process of terminating their employment.
Option B is incorrect because it is not the required number of days for a staff to be absent from duty before a fresh declaration must be obtained. Option C is incorrect because it is not the required number of days for a staff to be absent from duty before a fresh declaration must be obtained. Option D is incorrect because it is not a valid option.