What is the Mexico mandatory standard NOM-018-STPS-2000?

The standard NOM-018-STPS-2000 outlines the mandatory requirements for classification, labelling and safety data sheets in Mexico. However, despite this mandatory standard, companies are now permitted to author GHS SDS in Mexico, under the new standard NMX-R-019-SCFI-2011 (which came into force on June 4, 2011).