Mass. Gen. Laws ch. 34A, § 19
(A.) Form of Government.
(ii) Each county operating under this article shall be governed by an elected board of commissioners and a commissioner board chairperson and by such other officers and employees as may be duly appointed pursuant to this chapter, the general laws or by ordinance.
(iv) The executive power of the county shall be exercised by the board chairperson. He shall:
(v) The board chairperson.
(e) At his discretion, remove or suspend anyone occupying one of the offices specified in subclause (b) of clause (v) of subsection (B) of this section.
(C.) Board of Commissioners.
(i) The legislative power of the county shall be vested in the board of commissioners. Such legislative power shall be exercised by ordinance, except for the exercise of the following powers which are required to be, or are permitted to be, exercised by resolution:
(o) The expression of such board policies or opinions as require no formal board action.
(ii) The board of commissioners:
(g) Shall approve the annual operating and capital budget prior to presenting the budgets for advisory board appropriation.
(E.) Chief Administrator.
(iii) The administrative officer shall be responsible to the board through the chairperson except as specified below. He shall be responsible for the efficient administration of the county's government. He shall:
(iv) Powers.
The administrative officer shall:
(D.) Chairperson and vice-chairperson; election.
(B.) Board Chairperson.