Section 13. Boards of visitors

A  member  of  the board of visitors, a
  manager, trustee or officer of any state charitable or other institution
  receiving moneys from the state treasury  for  maintenance  and  support
  shall  be  entitled  to  actual  and  necessary  traveling expenses when
  attending meetings of the board at the office of the institution  or  in
  the  performance  of  other  official  duties  undertaken  pursuant to a
  resolution of the board of visitors of which he is a  member,  and  with
  the approval of the head of the department under the control of which an
  institution is maintained.