The primary changes between IPC-1752A Amendment 2 and Amendment 3 are:
- Addition of identity codes for query statements (Class A) and substance categories (Class C).
- Changes to some of the statement text (Class A), including the ability to define a part/product as either unknown or obsolete rather than both in the same statement.
- Replacement of JIG-101 with IEC 62474 as the primary electronics industry substance list. JIG-101 is no longer supported.