The Obligation and Responsibilities of a Somm

As a member of any food and beverage establishment, what are  the obligations of the Somm to the crew?   If in an establishment composed of four Level 3's, 5 Level's 2's, 4 Level 1's and 15 non Somms,  what role does each of the Somm Levels play in their interactions and communications with each other?   Is there any obligation at all?  Does the title Sommelier as given by Guild Somm have meaning and obligations beyond the rules, procedures and protocols of the establishment?