User:Levivich

All corporate powers shall be exercised by or under the authority of,
and the business and affairs of the Foundation shall be managed under,
the direction of the Board of Trustees
either directly or through a written delegation of authority.
— Wikimedia Foundation Bylaws, Article IV, Section 1

Unless otherwise delegated by the Board of Trustees to another body or person,
the Board of Trustees shall be empowered to make any and all
  regulations,
  rules,
  policies,
  user agreements,
  terms of use,
and other such decisions as may be necessary for the continued functioning of the Foundation not inconsistent with these Bylaws.
— Wikimedia Foundation Bylaws, Article IV, Section 10

The Chief Executive Officer ...
shall have charge of the business and affairs of the Foundation,
subject to the direction and control of the Board of Trustees,
and shall see that the resolutions and directives of the Board of Trustees are carried into effect except in those instances in which responsibility is assigned to some other person by the Board of Trustees.
— Wikimedia Foundation Bylaws, Article V, Section 1(D)