# Appendix - Reference Material

This costume addendum and the Saber Guild costume templates are updated twice a year to include new costume elements as new Star Wars materials are released.

Members who wish to suggest an update can do so [here](https://saberguild.org/message-the-council/).

Generally, for a new costume element to be added there must be three different characters from visual canon sources with that costume element.

#### Visual canon sources include

- Movies
- TV series
- Comic books (including Legends)
- Video game face characters

#### The following sources cannot be used

- Customizable video game characters
- Fan Art