6 
Content 
5.4 Implementation 84 
5.4.1 Preliminary remarks 84 
5.4.2 Requirements and necessary verifications 84 
5.4.3 Documents to be submitted to apply for operating release 84 
5.5 Operation 85 
5.5.1 Preliminary remarks 85 
5.5.2 Technical codes of practice 85 
5.5.3 Requirements and necessary verifications 85 
5.5.4 Documents to be submitted to maintain the operating permit 86 
5.6 Decommissioning 86 
6 Submarine cables 87 
6.1 Preliminary remarks 87 
6.2 Technical codes of practice 87 
6.2.1 Cabling within the wind farm 87 
6.2.2 Connection to the power grid 87 
6.2.2.1 Alternating current transmission 87 
6.2.2.2 Direct current transmission 88 
6.3 Documents to be submitted for the approval 88 
Appendices 89 
Appendix 1 Hull-retaining support structure for offshore wind turbines and 
offshore stations 89 
Appendix 2 Individual Technical Approval 93 
Appendix 2-I General procedure 93 
2-1.1 Fundamentals 93 
2-1.1.1 Requirements of an individual Technical Approval 93 
2-1.1.2 Application for an individual Technical Approval 93 
2-I.2 General process 93 
2-I.3 Miscellaneous 94 
2-I.4 Time schedule 94 
2.-1.5 Simplified procedure for Individual technical Approvals 94 
Appendix 2-II Special notes for procedures related to grouted joints 94 
2-11.1 Fundamentals 94 
2-II.2 General procedure 94 
2- II.3 Technical notes 95 
Appendix 3 Application notes for geotechnical verifications 96 
Appendix 3-I Consideration of cyclic loads in the design of foundation elements 96 
3- 1.1 Preliminary remarks 96 
3-I.2 Cyclic loads on offshore wind turbines 96 
3-I.2.1 Design event 96 
3-I.2.2 Equivalent load spectrum 98 
3.I-2.3 Loading conditions, design situations and respective partial safety 
factors 98 
3-I.3 Cyclic loads on offshore platforms 98 
3-I.4 Cyclic loads on measurement masts, cable towers and comparable 
structures 101 
Appendix 3-II Verification of the limit states for foundation elements taking into 
account cyclic loading 101 
3-11.1 Preliminary remarks 101