The mode and manner for recovering the cost of investigation are to be notified by the:

The question pertains to the authority responsible for notifying the procedures for recovering investigation costs. The Authority is the correct answer because, in most regulatory or legal frameworks, the 'Authority' refers to the primary governing body empowered to establish and notify such operational and financial procedures. This body holds the overarching responsibility for policy implementation and enforcement.

• Hearing Officer typically presides over specific cases and does not set general policy.
• Director General usually heads the executive operations but does not possess the power to notify general modes and manners for cost recovery.
• Board might oversee the Authority, but the Authority itself is the entity with the direct power to issue such notifications.

Understanding the hierarchy of powers is crucial here.