A district court judge who sits in the place of another judge in the trial or hearing of an action or proceeding in a district other than the judge's own or in the supreme court or who attends a conference of judges in Helena called by the chief justice of the supreme court must be paid the judge's actual and necessary travel expenses, as provided in 2-18-501 through 2-18-503, while engaged in that service as follows:
(1) travel expenses from the county seat of the county in which the judge resides to the place of trial, hearing, or conference and return; and
(2) board and lodging while engaged in the trial, hearing, or conference.