As of 7. September 2018 all CertAlarm partners (Contracted Certification Bodies and Recognized Test Laboratories, http://certalarm.org/ca/partners) will test and certify according to CertAlarm’s new ATS guideline. In the past, a transmitter could be given the EN 50136-1 certificate, when the device had only been tested to EN 50131-10 and EN 50136-2. The new guideline stipulates that to achieve the prestigious EN 50136-1 Alarm Transmission System Certificate, the test must include EN 50136-3 (for receiving equipment).