ISIRI 13138 is a standard published by the Institute of Standards and Industrial Research of Iran (ISIRI) in 2011 based on Directive 93/29/EEC. It defines "the identification of controls, tell-tales and indicators for two- or three-wheel motor vehicles".
Another source that was used in this standard is:
tell-tales and indicators for two- or three-wheel motor vehicles.
References
ISIRI 13138 Wikipedia(Text) CC BY-SA