The board of supervisors adopts the five-working-day week in the conduct of all county
business, except for officers and employees working in those county offices selected
to be open for different days and hours pursuant to Section 2.120.010 of this code, and it shall be the duty of the head of each department to stagger,
arrange and assign the work of his department so that each officer or employee therein
shall work not more than five days in each calendar week wherever in the opinion of
the department it is practical to do so; and the department head may adopt such a
plan as to some or all of the persons in his department or for certain weeks only
for certain persons, and he may change such plan from time to time at his discretion,
provided, however, that such arrangement or plan does not lessen the efficiency of
the operation of the department and does not require the employment of additional
help.