# The Offshore Installations (Safety Case) Regulations 1992, Regulation 9: Revision of safety cases


(1) An operator or owner who has prepared a safety case pursuant to these Regulations shall revise its contents as often as may be appropriate; but nothing in this paragraph shall require the revision to be sent to the Executive.
(2) Where a revision to be made under paragraph (1) (other than a revision to a safety case prepared pursuant to regulation 4(1)) will render the safety case materially different from the last version sent to the Executive pursuant to these Regulations, the revision shall not be made unless—
(a) the safety case incorporating the proposed revision has been sent to the Executive at least 3 months before the revision is to be made; and
(b) the Executive has accepted the revision,
and for the purposes of this paragraph in determining whether a revision will render the safety case materially different from the version referred to above, regard shall be had to the cumulative effect of that revision and any previous revisions made under paragraph (1) but not subject to this paragraph.
(3) Where the revision—
(a) relates to the drilling of a well or the carrying out of any other operation on a well the period referred to in paragraph (2)(a) shall be 21 days,
(b) is of a safety case prepared pursuant to regulation 6(2) and does not relate to the matters referred to in sub-paragraph (a), the period referred to in paragraph (2)(a) shall be 6 weeks,
instead of 3 months.
(4) Where an operator or owner has prepared a safety case in respect of an installation in accordance with regulation 4(2) or 5 or made a revision thereof in accordance with this paragraph, no person shall operate the installation beyond a period of 3 years from the date on which the last safety case or revision was accepted by the Executive unless during that period—
(a) the operator or owner who prepared the safety case or revision has revised the safety case and sent the revision to the Executive at least 3 months before that period has expired; and
(b) the Executive has accepted the revision.

---
Source: https://www.legislation.gov.uk/uksi/1992/2885/regulation/9 (the official version)
Page: https://openlegislation.uk/offshore-installations-safety-case-regulations-1992/regulation-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.