Which federal regulations outline the authority for safety and security zones?

The correct choice refers to regulations found in 33 CFR (Code of Federal Regulations), specifically sections 165 and 6, which address safety and security zones on navigable waters. These regulations grant the U.S. Coast Guard the authority to establish safety zones as well as security zones to protect vessels, waterfront facilities, and the public from hazards, particularly in circumstances involving potential threats like terrorist activities or natural disasters.

Section 165 provides detailed procedures for the establishment of safety zones, including public notification and the criteria for enforcement. It specifies actions to be taken in emergency situations to ensure the safety of maritime operations. Section 6 outlines the regulations regarding the establishment and enforcement of security zones, which are meant to secure sensitive areas and critical infrastructure from unauthorized access or activity.

The other options mention different parts of the CFR that do not pertain directly to the creation and management of safety and security zones in navigable waters, thereby making them less relevant for the query. Therefore, understanding that 33 CFR 165 and 33 CFR 6 specifically relate to the authority for establishing these crucial zones clarifies why this choice is the correct answer.