Section 140.4 - Relationship to other law(a) Design and equipment requirements of this subchapter for OCS facilities, including mobile offshore drilling units in contact with the seabed of the OCS for exploration or exploitation of subsea resources, are in addition to the regulations and orders of the U.S. Geological Survey applicable to those facilities.(b) Any apparent conflict between the application of any requirement of this subchapter and any regulation or order of the U.S. Geological Survey should immediately be brought to the attention of the Officer in Charge, Marine Inspection.(c) This subchapter does not establish design requirements for fixed OCS facilities or regulate drilling or production equipment on any OCS facility or attending vessel, except for matters affecting navigation or workplace safety or health.