The IAQG is the International Aerospace Quality Group, a body formed by the SAE. It brings together OEMs and suppliers from across the Aerospace Industry to agree international quality standards.
The IAQG website can be visited here: www.sae.org/iaqg/
The IAQG provides standards regarding many topics, one of which is part marking.
Specifically, the standard 9132 covers Data Matrix Quality Requirements for Parts Marking. Therefore, any reference that is made to IAQG part marking, or IAQG standards probably refers to the conditions contained in that standard. An example of this is the use of an IAQG stylus on a dot peen marking machine. Pryor offers a specific range of stylus that enable dot peen marking in line with the IAQG marking standards.
More can be learned about the 9132 standard here.
And our guide to achieving pass marks under the 9132 standard is available here.