What is a requirement for all jobsite containers according to WHMIS?

For all jobsite containers, the requirement set forth by the Workplace Hazardous Materials Information System (WHMIS) is that they must have a workplace label. This is crucial for ensuring that any hazardous materials are clearly identified, providing essential information about the contents and their potential risks.

Workplace labels serve to communicate safety information effectively. They must include the product identifier, words, pictures, symbols, or a combination of these that provide general information about the hazards of the chemical. This labeling is vital for safety as it helps workers handle and use the materials properly, reducing the risk of accidents or injuries on the job site.

The other options do not align with the specific WHMIS regulations regarding jobsite containers. Containers do not have to be transparent, there is no general requirement for color coding, and expiration dates are not a standard requirement under WHMIS guidelines. Therefore, the presence of a workplace label is the correct and most relevant requirement for jobsite containers.