K. Determine that all test and measuring instruments required as part of the Follow-Up Services Procedure or used by UL Field Representatives in the conduct of inspection activity at the factory are calibrated in accordance with UL’s published calibration requirements for manufacturers. The published document is titled, “UL Calibration Requirements: Equipment Used for UL/C-UL/ULC Mark Follow-Up Services”, and is available on UL’s website at the following address, "www.ul.com/fieldservices/requirements.html". Manufacturers that do not have internet access may obtain the current version from their local UL Customer Service representative in the same manner as other requests for requirements.