What is the main focus of Subchapter B in 49 CFR?

Subchapter B in 49 CFR primarily deals with the safety approval requirements for cargo containers. This section outlines the specifications and standards that cargo containers must meet to ensure they are safe for transportation. It includes regulations that cover the design, construction, and testing of containers to prevent accidents and ensure the protection of both the cargo and those involved in the shipping process.

The focus on safety is crucial because cargo containers are exposed to various conditions during transportation, including loading, unloading, and transit across different modes of transport, such as ships, trucks, and trains. Ensuring these containers meet safety criteria helps mitigate risks associated with container failures, such as spillage of hazardous materials or structural collapses.

Other options, while they address important aspects of transportation law and logistics, do not encapsulate the primary theme of Subchapter B. Shipping rate controls, environmental impacts of shipping, and labor regulations are covered under different provisions and subchapters within the 49 CFR framework. Thus, the emphasis on cargo container safety in Subchapter B is what distinctly defines its focus.