Entitlement to a bridging pension exists only if, for 15 years (or at least 10 years for a reduced pension) within the last 20 years–including the last seven years prior to receiving benefits–you have been continuously employed in a position subject to contributions at a company covered by the FAR collective bargaining agreement.
A mandatory prerequisite for recognizing temporary assignments as subject to the FAR Collective Bargaining Agreement is always that the host company is also subject to the FAR Collective Bargaining Agreement.