Section 8108. Specification of denial or award of costs

A denial of costs
  in an action to a party in whose favor the judgment is entered, an award
  of costs in an action to a party against whom the judgment  is  entered,
  an  award  of  separate costs in an action to one or more parties, or an
  apportionment of costs among several  parties,  shall  be  made  in  the
  direction  of  the court for judgment, or in the report or decision upon
  which judgment is entered, or, upon motion of the party to be  benefited
  thereby,  by an order of the judge or referee who presided at the trial.
  The decision on a motion shall specify the amount of costs awarded  upon
  the  motion,  if  any,  and  each  party  to  whom they are awarded. The
  decision on appeal shall specify  the  disposition  made  in  regard  to
  costs.