Unlike the college ranks or other states, the regions and districts are not permanently set, but are redrawn biennially by the UIL behind closed doors in an attempt to keep schools of similar sizes within a certain distance of their geographic area when attending competitions, and to adjust for the changing enrollments of schools (moving schools with increased attendance up in conference and those with decreased attendance down) and new schools opening. The main redrawing of regions and districts takes place on February 1 of even-numbered years (and the final allocation, especially relating to high school football, is the subject of much pre-announcement anticipation and speculation as to which schools move up or down and the final composition of the districts), but as new schools open or smaller schools close or disband programs, interim adjustments can be made.