This information sheet has recently been made available by OSDR. It provides guidance on compliance with the law for controlling risks associated with seismic events.
Duty holders should be able to demonstrate that fixed structures and compliant structures such as tension leg platforms (TLP) and articulated towers and their safety and environmental critical elements are sufficiently robust when subjected to foreseeable seismic events. Compliant offshore structures such as TLPs and articulated towers are not ‘vertically compliant’ and hence require seismic assessment due to vertical ground motion.
Source: OSDR.