It shall be the duty of collectors, postmasters, assistant treasurers,
naval officers, surveyors, appraisers, and custodians of public
buildings at places where examinations are to be held to allow and
arrange for the reasonable use of suitable rooms in the public buildings
in their charge, and for heating, lighting, and furnishing the same for
the purposes of such examinations; and all other executive officers
shall in all legal and proper ways facilitate such examinations and the
execution of these rules.