SAN FRANCISCO >> The basketball officiating alliance between the Pac-12 and Mountain West conferences is about to get bigger.

The alliance, in place the past two seasons, will now include the Big West, West Coast and Western Athletic conferences, starting with the upcoming season.

Bobby Dibler, officiating coordinator for the Pac-12 and Mountain West, will serve the same role with the five-conference alliance. Dibler also served as coordinator of officiating for the WAC for 23 years and the Mountain West since its inception in 1999.

A focus for the expanded officiating alliance will be on training. Dibler and his staff will host a training clinic for all roster officials to review mechanics, game situations, rules knowledge and other elements.