One of the major changes taking place in this standard is the approval or acceptance by ANSI of all the ISO 3864-2 formatted safety signs as a valid option for product safety labels in the US.
3.1.1 ISO-formatted safety signs: Product safety information may be conveyed by ISO formatted safety labels in compliance with ISO 3864-2,Graphical Symbols - Safety colors and safety signs - Part 2: Design principles for product safety labels. from ANSI Z535 2007
Product Safety Labels using the signal words shown on the Illustration 1.1 below, can only be used on equipment sold in the USA and Canada, because they lack several components to comply with the international standards for equipment labeling (ISO 3864).
Illustration 1.1 ANSI Z535.4 2002 & 2007 Compliant Safety Labels
Product Safety Labels using the signal words and surround shape safety symbols shown below on the Illustration 1.2 are in compliance with ISO 3864-2 Standard (as long as the safety symbol is contained in a surround shape like a yellow triangle, prohibition circle, or blue circle; and the safety alert symbol seen on the signal word is within a yellow triangle.
Illustration 1.2 ANSI Z535.4 2007 & ISO 3864-2 Compliant Safety Labels