Certified Master Locksmith (CML) is a trade qualification awarded to members of the Associated Locksmiths of America who have passed the required tests.
This is the fourth of four designations available from ALOA. It demonstrates proficiency in a very wide range of security aspects.
Certified Professional Locksmiths are eligible to test for CML status.
The CML accreditation is proctored by ALOA, as a part of its Proficiency Registration Program (PRP).
References
Certified Master Locksmith Wikipedia(Text) CC BY-SA