SIOUX FALLS, S.D. (MITCHELLNOW) Major parking changes take effect today in downtown Sioux Falls.  Meters will now be enforced six days a week. That means enforcement will now include Saturdays from 9 a.m. to 5 p.m. The “Text to Park” option is also active starting today, and there’s a new city law in effect that prevents large pickups, vans, and SUVs from parking on Phillips Avenue between Ninth and 13th streets.