What are the chief statutory ship certificates carried by a UK-flag Class VII MODU (e. g. a semi-submersible drilling rig) built prior to introduction of the MODU Code?

Certificate of British Registry; 

Safe Manning Document; Cargo Ship Safety Construction Certificate; Cargo Ship Safety Equipment Certificate; Cargo Ship Safety Radio Certificate; Cargo Ship Safety Certificate (as an optional alternative to the previous three certificates); International Oil Pollution Prevention Certificate; International Sewage Pollution Prevention Certificate (new ships); Engine International Air Pollution Prevention Certificate(s); International Air Pollution Prevention Certificate; International Load Line Certificate; International Tonnage Certificate; ISM Document of Compliance and Safety Management Certificate (or Interim DOC and/or Interim SMC); International Ship Security Certificate (or Interim ISSC); Bunker Oil Pollution Insurance Certificate.