The latest release of the Conformance Test tool is CTT3.1 r107 released on 23rd October 2018.
The latest release of the Object definitions file is V3.6 released on 25th August 2020.
Self-testing: Test performed by the licensee on its own products or on products manufactured by one of its Affiliates registered with the DLMS UA.
Third party testing: Test performed by the licensee on a product of a third party. Any CTT licensee may act as a third party tester.