Where a sprinkler system is installed for purposes of life safety, legislators, clients, consultants, and fire sprinkler contractors should be aware that the specified works and design shall comply with life safety standards stated in approved document B. Technical Bulletins do make some enhancements regarding life safety that also extend to the “upkeep” (by employing TB 203 as a replacement to clause 20) and therefore TBs are often specified for life safety sprinkler systems (even though they are optional).