(a) Regular jurors, grand and petit, shall be entitled to $10.00 expense allowance for each day's services, $.05 for each mile traveled in going to and returning from court and ferriage and toll, to be proved by the oath of the juror before the clerk of the court. The clerk shall give each juror a certificate, stating therein the number of days he has served, the number of miles he has traveled, the amount of ferriage and toll he has paid and the amount of expense allowance to which he is entitled. The certificate shall be payable out of the State Treasury.
(b) The provisions of this section shall be retroactive to May 23, 1977.