Boise State announced in December that it was leaving the Mountain West and moving its football program to the Big East and most of its other sports to the WAC in 2013.

But the school has yet to officially withdraw from the Mountain West — and time is running out if the Broncos are to avoid stiffer financial penalties from the league.

Boise State must deliver written notice to the league and its other members “on or before” June 30, according to the Mountain West’s handbook.

By giving one year’s notice, Boise State would forfeit its final year of revenue due June 30, 2013.

However, if the Broncos withdraw after Saturday, they will forfeit the final year of revenue and pay either $5 million or double the amount of final year revenue, whichever is greater. That money would be due on the day Boise State notifies the Mountain West it is leaving.

The Broncos are still seeking a more stable home for their non-football sports as the WAC has been stung by a series of defections. Boise State has been negotiating with the Big West for non-football sports.

Brian Murphy: 377-6444