# Change Requests

According to the Terms of Reference every participant of IEHG is entitled to transmit proposals for amendments of the standard together with an explanation via the [IEHG discussion forum](https://github.com/orgs/IEHG/discussions). The following form has to be used to submit a change request:

{% file src="/files/EkfpxzNtPB7hSeYtIEf2" %}
Change request form (updated in 2025)
{% endfile %}

{% file src="/files/OLatIqfgcNxkl2w3ryKi" %}
Guideline for the drafting of change requests (updated in October 2023)
{% endfile %}

There is also a guideline for the development of new symbols for S-401 and an example for an annex to a change request that contains new symbols:

{% file src="/files/ZXxpu8J1iBd7Y2V2zL51" %}
Description of the SVG profile scheme for symbols, that has to be taken into account for new symbols
{% endfile %}

{% file src="/files/rSpAOY8657IsRjIM7y52" %}
Example of a proposal for a new symbol. Please replace the elements in the second column of the form with your text and pictures.
{% endfile %}

A list of all change requests and the next available change request number can be found at <https://docs.google.com/spreadsheets/d/1darzMTlkqN4nDWOetW_6vCuqbGukEvN_9XYohwB_QLE/edit#gid=839558529?>&#x20;


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