Русско-англо-русский юридический словарь

A commander-in-chief is the person or body that exercises supreme operational command and control of a nation's military forces or significant elements of those forces. In the latter case, the force element is those forces within a particular region, or associated by function. As a practical term, it refers to military competencies that reside in a nation-state's executive leadership—either a head of state, a head of government, a minister of defence, a national cabinet, or some other collegial body. (Wikipedia)

"""Internationally protected person"" means: (a) A Head of State, including any member of a collegial body performing the functions of a Head of State under the constitution of the State concerned [...]" (Convention on the Prevention and Punishment of Crimes against Internationally Protected Persons, including Diplomatic Agents)

Mrs. Clinton's advisers said the incident underlined her continuing attempt to portray Mr. Giuliani as erratic, divisive and temperamentally unsuited for a collegial body like the Senate. (The New York Times)

In his book “The Supreme Court,” the late Chief Justice William Rehnquist described the Supreme Court as “a collegial body where long-term success depended on winning over others of quite different backgrounds.” (The New Yorker)