Bargaining Unit Work/No Subcontracting. No administrative representative, supervisor, (except the maintenance and transportation Supervisors), teacher, or other persons not a part of the bargaining unit covered by this Agreement, shall take the place of or substitute for SEIU bargaining unit personnel, thus depriving an SEIU bargaining unit member of a job. This shall also apply to any possible overtime. There shall be no subcontracting of bargaining unit work during the term of this agreement, defined as any period of wage and benefit agreement, except by mutual agreement between the Union and the District. This provision is specific to continuous employment, as it is understood that project work (work of a temporary nature) that bargaining unit members do not have the ability to complete on a timely basis is an acceptable exception.