  During the preparatory phase of the International Linear Collider (ILC)
project, all technical development and engineering design needed for the start
of ILC construction must be completed, in parallel with intergovernmental
discussion of governance and sharing of responsibilities and cost. The ILC
Preparatory Laboratory (Pre-lab) is conceived to execute the technical and
engineering work and to assist the intergovernmental discussion by providing
relevant information upon request. It will be based on a worldwide partnership
among laboratories with a headquarters hosted in Japan. This proposal, prepared
by the ILC International Development Team and endorsed by the International
Committee for Future Accelerators, describes an organisational framework and
work plan for the Pre-lab. Elaboration, modification and adjustment should be
introduced for its implementation, in order to incorporate requirements arising
from the physics community, laboratories, and governmental authorities
interested in the ILC.
