15 - Payment of salaries and expenses.

§  15.  Payment of salaries and expenses.  The salaries of the members  of the board of transportation and the salaries  and  expenses  paid  or  incurred  in the exercise of their powers and duties shall be chargeable  to such city, and shall be audited and paid as  follows:  The  board  of  estimate,  on  requisition  duly  made  by  the board of transportation,  stating  the  purposes  for  which  such  moneys  are  required,   shall  appropriate  such  sums  of  money  as  the  board  of estimate may deem  necessary for the payment of such salaries and expenses.  The city shall  not be liable for any indebtedness incurred by the board, or any  member  thereof,  in  excess of such appropriations. It shall be the duty of the  comptroller, after such appropriation shall  have  been  duly  made,  to  audit  and  pay  the  salaries  and expenses of the board, upon vouchers  therefor to be furnished by the board, which payment shall  be  made  in  like  manner  as  payments are made by the comptroller of claims against  and demands upon such city. In case of municipal operation all  salaries  and  expenses  incurred  in  connection  with  such  operation  shall be  included in the expense of operation.