rne:WM at least once in the first 30 minute period of the hour (example, 12:00 a.m. — 12:30 a.m.) followed by another round in the second 30 minutes peri &Cif the same hour (example, 12:30 am — 1:00 a.m.), thus ing au i ttttt ate is ubsct vcd at !cast twice cr hour. These rounds arc tc }tex y conducted on