ISO/IEC 30122-4:2016 defines supplementary procedural information, requirements and criteria that apply to a collection of voice commands published as a web-accessible voice command database. They are based on Annex SL of the IEC supplement to ISO/IEC Directives. It also defines the method for adding, changing or withdrawing voice commands in an electronic database of standard voice commands.

Annex SL ISO/IEC Directives - Supplement - Procedures Specific to ISO is followed for management of voice command registration unless otherwise specified in ISO/IEC 30122-4:2016.