The Clarion register has all the same fingerings as the Chalumeau register with the addition of the register key. The key difference is that the Clarion register is 13th (an octave + a fifth) above Chalumeau register.
Standard Fingerings
Chromatic Fingerings (Changed fingerings in orange)
Note: Throat Tones do not exist in the Clarion register. No need to place your right hand down. when play C.
Chromatic Fingerings: Use all the standard fingerings and the chromatic fingering for Bb/A#.
Alternative Fingerings: Use the alternative fingerings for G#/Ab when going to a pitch that uses the right hand.