Regarding the caucuses, the bylaws state: Section 8. College or Division Caucuses. Each unit (college or division of the College of Arts and Sciences) will have a caucus comprising all Senators and Alternates. The convening caucus chair will be elected by that caucus during May. The caucus will be responsible for timely communications with the faculty in the unit and will be provided with LISTSERVs for their units by the office of the Senate President. The caucus will call meetings of the faculty as needed. The caucus will be assisted by the dean's office, who will function as a de facto administrative secretary for the caucus, with responsibilities including calling meetings, taking and distributing minutes, etc. The caucus will be responsible for making nominations to the Senate after an appropriate call for nominations. The caucus will be expected to provide nominees, when requested, to the Senate President for Senate and other committees.
Other than facilitating communications by the list server (for which you will be the "keeper") and special meetings if needed, most of the responsibilities for the chair are in the Spring. These include (1) generating candidates for the Senate Elections and distributing/counting the ballots with the assistance of the office of the Dean; (2) serving on the Committee for Nominations and Appointments, which meets twice to staff the committees for the following year; and (3) working to elect a new chair in May.