Complex sentence: Western State University had been previously approved from February 1998 through early August 2004, at which time the school did not receive full approval but was allowed to reapply for provisional approval on an expedited basis, resulting in the granting of provisional approval in February 2005.
Split into simpler sentences: Western State University had previously been provisionally approved from February 1998 through early August 2004, after which time the school did not receive full approval. Instead, it was allowed to reapply for provisional approval on an expedited basis, resulting in the granting of provisional approval again in February 2005.