# 550.283 When must I revise or supplement the approved EP, DPP, or DOCD?
(a) *Revised OCS plans.* You must revise your approved EP, DPP, or DOCD when you propose to:
(1) Change the type of drilling rig (e.g., jack-up, platform rig, barge, submersible, semisubmersible, or drillship), production facility (e.g., caisson, fixed platform with piles, tension leg platform), or transportation mode (e.g., pipeline, barge);
(2) Change the surface location of a well or production platform by a distance more than that specified by the Regional Supervisor;
(3) Change the type of production or significantly increase the volume of production or storage capacity;
(4) Increase the emissions of an criteria air pollutant, VOC, or TSP to an amount that exceeds the amount specified in your approved EP, DPP, or DOCD;
(5) Significantly increase the amount of solid or liquid wastes to be handled or discharged;
(6) Request a new H<sub>2</sub>S area classification, or increase the concentration of H<sub>2</sub>S to a concentration greater than that specified by the Regional Supervisor;
(7) Change the location of your onshore support base either from one State to another or to a new base or a base requiring expansion; or
(8) Change any other activity specified by the Regional Supervisor.
(b) *Supplemental OCS plans.* You must supplement your approved EP, DPP, or DOCD when you propose to conduct activities on your lease(s) or unit that require approval of a license or permit which is not described in your approved EP, DPP, or DOCD. These types of changes are called supplemental OCS plans.
[76 FR 64623, Oct. 18, 2011, as amended at 85 FR 34936, June 5, 2020]