What information must be included on a red tag regarding the firm's contact details?

• A. Firm's name, address, and phone number
• B. Owner's name and email
• C. Building location details
• D. Certificate of registration number

Answer: (A)

The essential idea is that the red tag serves as a quick way to identify who serviced the system and how to reach them. Including the firm’s name, physical address, and a working phone number makes it easy for building owners, inspectors, or maintenance personnel to contact the company responsible for the work. This supports accountability and ensures there’s a clear, reachable point of contact if questions or follow-ups arise after the service.

Owner’s name and email aren’t the designated contact details for service work, and building location details aren’t the purpose of the tag. A certificate of registration number might identify the company, but it doesn’t provide direct contact information, which is the key function of the tag.