30 C.F.R. § 250.239
What structural information must my DWOP include?
You must include the following information in your DWOP, as applicable, to align with the activities to be addressed in the associated platform application, including any major modifications:
(a) Structural design, fabrication, and installation information;
(b) Design, fabrication, installation, and monitoring information on the tendon, or mooring systems, including the turret or buoy system, if applicable; and
(c) Information on any active station keeping system(s) involving thrusters or other means of propulsion.