The AAMVA Joint Mobile Driver’s License (mDL) Working Group (WG) has been active around mobile identification since 2012. As the mDL evolves, the mDL WG continues to identify and address topics on which guidance to Issuing Authorities can be helpful.
 
AAMVA's Mobile Driver's License (mDL) Implementation Guidelines, Version 1.4, represents the bulk of the current guidance, and points to additional resources as needed. The goal of this document is to inform and equip Issuing Authorities, and to some extent mDL verifiers, to achieve the following:

• Technical interoperability between different Issuing Authorities’ mDL programs, i.e., an Issuing Authority being able to read an mDL issued by any other Issuing Authority.
• Trust in different Issuing Authorities’ mDLs.
• Privacy preserving implementations. 

This document leverages and expands on ISO/IEC 18013-51 (also available as INCITS/ISO/IEC 18013-5), an international mDL standard. Although ISO/IEC 18013-5 specifies an mDL solution, it was intentionally designed to support any type of mobile identity credential. ISO/IEC 18013-5, as qualified in this document, will therefore enable Issuing Authorities to issue both mobile driver’s licenses and mobile identification cards. Read more here.