137. The authorization holder must ensure that the marine riser used(1) furnishes access to the well;
(2) isolates the well from the body of water;
(3) withstands the differential pressure of the drilling fluid relative to the body of water;
(4) withstands the physical forces anticipated in the drilling program;
(5) permits the drilling fluid to be returned to the installation; and
(6) is supported in a manner that effectively compensates for the forces caused by the motion of the drilling installation.