Who can designate a public servant for the duties of the director in their absence?

The ability for a public servant to designate another individual to assume their responsibilities while they are absent is typically reserved for the individual holding that position. Therefore, the correct choice states that the director themselves can make this designation. This delegation of duties ensures that there is continuity in leadership and decision-making processes within the organization.

Other options may suggest authority from various levels of government or administrative hierarchy; however, direct delegation in this context is usually handled by the person currently in the role to maintain operational efficiency and accountability. This practice reflects standard protocols in management and governance where individuals are empowered to ensure their responsibilities are fulfilled even when they are not present.