scope:

This standard defines requirements for the regulation and control of the conditions under which assets may be permitted to remain in use for a pre-determined period following the discovery or introduction of non-compliance with London Underground (LU) standards.

This standard applies to assets in most asset groups (for exceptions see clauses 2.6 and 3.1.1). It provides a process for the management of all non-compliance discovered or introduced by whatever means and which will be made compliant in accordance with the TANC Management Plan.

The steps described in this standard are not an alternative to other mandatory standards or legal requirements which preclude or specify prescribed circumstances under which assets may remain in service for a defined period pending the rectification of specified defects and which provide for the monitoring and signing off of the rectification works. The interface between such standards and this standard is described in greater detail in Section 3.

This standard does not cover permanent /indefinite, planned or known non-compliance with standards. If non-compliance is discovered or introduced and which is expected to continue beyond the non-compliance close-out date identified in the TANC Management Plan an application for a Concession must be made in accordance with LU standard S1641 "Concessions to standards".

This standard shall not be used to allow non-compliant assets to remain in use where this would put LU in breach of any regulation, or where there are specific prohibitions in LU standards. For the avoidance of doubt, this standard shall not be used in the heavily regulated Lifts and Escalators (L&E) asset group where the overriding obligation to be legally compliant renders the TANC process inappropriate.

The competence requirements in this standard apply to LU and all other Suppliers employees engaged in the role of Temporary Approved Non-Compliance (TANC) Authorised Person (TAP) when managing non-compliance in accordance with this standard.

Purpose

This standard describes the steps to take to permit non-compliant assets to temporarily remain in service and provide the appropriate compliance documentation.

The aim of this standard is to ensure that all discovered or introduced non- compliant assets that are allowed to temporarily remain in use are covered by a Temporary Approved Non-Compliance (TANC) Management Plan. The TANC Management Plan (described in clause 3.2) ensures that all tolerable safety risk is assessed and managed through timely and appropriate controls / mitigation at a level that is as low as reasonably practicable.

To ensure that only staff that have been assessed and recorded as competent via a competence management system or by holding an appropriate Safety Critical License undertake the role of a Temporary Approved Non-Compliance Authorised Persons (TAP) to permit non-compliant assets into service subject to risk assessment and a management plan to reduce risk to as low as reasonably practicable (ALARP).