What must be punched on the service tag as part of the servicing documentation?

Punching the month and year on the service tag is a critical part of the servicing documentation for fire extinguishers. This date serves as an official record of when the service was performed, which is important for both compliance with safety regulations and for tracking maintenance history. Keeping an accurate timeline helps ensure that the extinguisher is serviced regularly, adhering to required intervals for maintenance and inspections. Additionally, it provides vital information for users to assess the extinguisher’s readiness and reliability in the event of an emergency.

The other options, while relevant to servicing or ownership, do not serve the same purpose for official documentation on the service tag that is universally required.