Library / Page 1 of 67 MIDSTREAM AND DOWNSTREAM PETROLEUM SAFETY AND ENVIRONMENTAL REGULATIONS, 2025
Page 1 of 67 MIDSTREAM AND DOWNSTREAM PETROLEUM SAFETY AND ENVIRONMENTAL REGULATIONS, 2025

Page 45 of 67
Page 45 of 67 
 
 
(4) In respect of the decommissioning and abandonment of any installations, structures, utilities, 
processing plants, pipelines, or other facilities or infrastructure relating to a licence for 
midstream petroleum operations offshore, the licensee shall make an application to the 
Authority for approval to decommission and abandon at 24 months prior to the proposed start 
date of the decommissioning and abandonment programme. 
 (5) An application under sub-regulation 4, shall be accompanied by a decommissioning and 
abandonment programme in a Form prescribed by the Authority in addition to the requirement 
for a decommissioning and abandonment philosophy which shall comprise of —   
(a) description of items to be decommissioned and abandoned, inclusive of 
diagrams, covering —   
(i) support structure for offshore fixed and floating installations at the time of 
removal (type, size, arrangement, and weights), 
(ii) topsides for offshore fixed and floating installations (type, size, 
configuration, equipment, and weights), 
(iii) for pipelines, flow lines and umbilicals – lengths, diameters, type of 
construction, the extent of burial, trenching and details of any concrete 
mattresses, frond mattresses, grout bags, rock-dump or other materials 
used to cover the lines, 
(iv) details of any subsea facilities that form part of the pipelines, such as 
production line end manifold, umbilical termination assembly, riser 
anchor bases as it relates to midstream and downstream operations, 
(v) information about the stability of the pipelines including details of any 
spanning or exposure (met-ocean data, survey data and history to 
support information given in this section should be included as an annex 
to the decommissioning and abandonment programme, live pipeline 
survey information may be relevant), 
(vi) details of interaction between any part of the pipelines and other uses of 
the sea (in particular fishing activity, marine traffic, marker buoy 
positioning both historical and where relevant to estimate future activity), 
and 
(b) where there is a related equipment that is not covered by the decommissioning 
and abandonment programme, details shall be provided for such equipment and 
explanation provided of why it is not part of the programme; 
(c) proposals for identification and removal of seabed debris following 
decommissioning and abandonment works;  
(d) for the removal and disposal methods, details of any materials and remains on 
the seabed after decommissioning and abandonment;