A Management Prestart Review (MPR) for the National Ignition Facility (NIF) vacuum testing of spatial filters, the Cavity Spatial Filter (CSF) and the Transport Spatial Filter (TSF), was conducted during March 2001. The review was performed to determine the readiness of the Beamline Infrastucture System (BIS) team and the Integration Management and Installation (IMI) contractor to start the vacuum testing of the components and assemblies that constitute the four CSF clusters and four TSF clusters in the NIF laser. This review assures that appropriate engineering, planning and management is in place to start this testing. Completion and acceptance of this report satisfies the LLNL requirement for MPRs to be conducted whenever a significant new risk is introduced into a project and is an essential part of the ISM work authorization process. This MPR provides to the NIF Project Manager an independent, systematic assessment of readiness of line management to start vacuum testing; completeness of planning for this testing; readiness of personnel to conduct this testing; and hazards inherent in this testing and implementation of prevention and mitigation activities to minimize the chance of injuries and damage to equipment and facilities during this testing.