30 CFR §250.735

1. (a)An accumulator system (as specified in API Standard 53, incorporated by reference in § 250.198). Your accumulator system must have the fluid volume capacity and appropriate pre-charge pressures in accordance with API Standard 53. If you supply the accumulator regulators by rig air and do not have a secondary source of pneumatic supply, you must equip the regulators with manual overrides or other devices to ensure capability of hydraulic operations if rig air is lost;
2. (b)An automatic backup to the primary accumulator-charging system. The power source must be independent from the power source for the primary accumulator-charging system. The independent power source must possess sufficient capability to close and hold closed all BOP components under MASP conditions as defined for the operation;
3. (c)At least two full BOP control stations. One station must be on the rig floor. You must locate the other station in a readily accessible location away from the rig floor;
4. (d)The choke line(s) installed above the bottom well-control ram;
5. (e)The kill line must be installed beneath at least one well-control ram, and may be installed below the bottom ram;
6. (f)A fill-up line above the uppermost BOP;
7. (g)Locking devices for all BOP sealing rams (i.e., blind shear rams, pipe rams and variable bore rams), as follows:
   1. (1)For subsea BOPs, hydraulic locking devices must be installed on all sealing rams;
   2. (2)For surface BOPs:
      1. (i)Remotely-operated locking devices must be installed on blind shear rams no later than April 29, 2019;
      2. (ii)Manual or remotely-operated locking devices must be installed on pipe rams and variable bore rams; and
8. (h)A wellhead assembly with a RWP that exceeds the maximum anticipated wellhead pressure.