B.3.4:4.6 - Worked cases: the same age, different decisions

Bridge. An earlier structural assessment supports a specified load envelope, conditional on its stated condition and inspection regime. For an unchanged limited use, available load and condition information and satisfied required inspections can preserve that support. The assessment’s age alone adds no repeat assessment. In the paired case, proposed traffic exceeds the envelope: the earlier report does not support that use, however recent its cover date. Obtain the assessment or restriction needed for the changed load before relying on the stronger claim.

Suppose the available inspection team can either inspect a suspected load-bearing defect or repeat an already adequate check whose relevant conditions remain established. Examine the protected harm and the basis of the inspection requirement, what each result could change, and the cost of delay. Where the defect inspection can prevent that harm and the repeat adds no useful information, preserve the inspection capacity. If a currently binding repeat requirement prevents that choice, seek an authorized amendment; the resource conflict does not itself remove the requirement.

Library. The verified property of an unchanged library in its qualified configuration remains supported when the relevant assumptions and dependencies still hold. A new vulnerability affecting a dependency used by the security claim reopens that claim even before a review date. An unrelated vulnerability does not. Preserve unaffected functional results and any independently supported restricted service while addressing the security limitation. A release recipient who would otherwise assume the affected security property needs that limitation in the released result.