Which of the following is required for a pesticide to be legally transported?

A pesticide must be in an unbroken, labeled container for it to be legally transported. This requirement ensures that the product is properly identified and that users can access critical safety and handling information. The labeled container provides essential details such as the product name, active ingredients, and application instructions, which are important for safe handling and compliance with regulations.

Having an unbroken container is also crucial for preventing spills and accidents during transportation, which could pose risks to people and the environment. Proper labeling and containment help maintain product integrity and ensure that the pesticide is used according to its intended purpose, following the manufacturer's guidelines and regulatory requirements.

The other considerations, such as temperature storage or container size, do not directly impact legal transportation requirements in the same way that labeling and containment do. Proper storage conditions may be important for maintaining pesticide efficacy, but they do not relate to the legality of transporting the pesticide itself. Additionally, having an expired usage registration would not conform to regulations, as all pesticides need to have current registration status for legal transport. Hence, the necessity for an unbroken, labeled container stands out as the key requirement for legal transportation of pesticides.