Section 48. Each regularly employed trial or grand juror shall be paid regular wages by his employer for the first three days, or part thereof, of juror service. Regular employment shall include part-time, temporary, and casual employment as long as the employment hours of a juror reasonably may be determined by a schedule or by custom and practice established during the three-month period preceding the term of service of such juror. Each self-employed trial or grand juror shall compensate himself for the first three days, or part thereof, of juror service.