It contains the essential elements of the system; however, third parties may enhance or modify the design as required.

When differences are discovered, the geotechnical engineers evaluate the new findings and, when necessary, modify their design and construction recommendations.

The licensee may modify the design (e.g. for local conditions) and assign a local name.

The opportunity was taken to modify the design to incorporate experience and lengthen the ships by 4.5 m.

They then modified the design slightly and filed it under patent 5,507,232 in 1995.