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Part B - Verifications and approval requirements 
- Verification pertaining to the transport and installation states 
With respect to the operation, all modifications resulting from ongoing opera 
tions shall be documented in the operations manual which shall be accordin 
gly updated. 
[Doc. No. 252] Annual certificate of conformity confirming that tests and inspections have 
been carried out in accordance with Doc. No. 250 and in compliance with the 
test and inspection plan for periodic inspections. 
2.6 Decommissioning phase 
2.6.1 Preliminary remarks 
When operations cease, the offshore structures are generally to be decommissioned. This re 
quires a detailed plan to be drawn up and a verified version presented to the BSH for ap 
proval. 
The approval holder is responsible for compiling a decommissioning instruction manual. The 
objective of the decommissioning instruction manual is to provide a plausible representation 
of all the processes involved and the respective technical boundary conditions. 
The detailed final design for carrying out the decommissioning work is the responsibility of the 
approval holder in cooperation with the respective contractor and shall take due considera 
tion of the legal provisions and be accordingly inspected by the appointed inspector. This plan 
shall be compiled under consideration of the equipment that is actually going to be used and 
the respective conditions, including but not limited to the following points: 
• Project management 
• Verification of the design documentation 
• Verification pertaining to transport and transport safeguards 
• OVC (Offshore Vehicle Coordinator) 
• Verification of the disassembly concept, e. g. regarding the buoyancy of the structure (e. g. 
the operational structure (topside)), ensuring adequate buoyant force and a sufficient dis 
tance from the base of the body of water 
• Verification of the components is achieved through a visual examination and includes, 
among others, material verifications, correct disassembly conditions, anchor devices, dis 
posal verifications and 
• Risk analyses. 
For the decommissioning phase, all the major components and installations, resp. disassem 
bled parts, shall be accordingly represented - from the decommissioning location to being 
transported to the port - in order to minimise the risks. The verifications are analogous to 
those required during installation. 
The decommissioning instruction manual does not need to be updated; changes shall be 
documented and coordinated with the approval authority. 
2.6.2 Technical codes of practice 
The following technical codes of practice, among others, in their respective current version, as 
well as the current state of the art, shall apply: