12 Larger silver discs (of which the 12 CDT-Plates are part) manufactures at the same time as the CDT-Plates, are a technology through which the 12 Primary Start Gates of the Universal Templar Complex, which span the dimensional fields and galaxies of dimensions 1-12, can be manually activated and opened.

The 12 CDT-Plates discs are the Activators for the 12 Signet Shields.

The CDT-Plate-Signet Shield protection has been commissioned to the Azurite Races, the Sirius B Council of Azurline and remains under the highest security possible. In the wrong hands, the CDT-Plates-Signet Shield technology could bring universal devastation to this Time Matrix.

(Voyagers I – Page xliii)

The 12 Signet ("Star Gate") Shield disks were given to the Human Cloister Race Guardians of Earth over 200000 years ago, by the Maharaji of Sirius B, on behalf of the Elohei-Elohim Emerald Covenant Founders.

The 12 Shields are manual activation/control devices for Earth's 12 Star Gates, which can be put into use by combining them with their corresponding Emerald Covenant CDT-Plates disc activators.

The Wingmakers site in New Mexico has been the storage place for the Signet Shield-6, since the device was removed from the Cue Site-6 in India.

(Voyagers II – Page 555)