This part of IEC 61156 applies to Capability Approval requirements for cables intended to construct patch, equipment, and work area cords for digital communications in accordance with generic specification IEC 61156-1-1 and Clause 4 of the sectional specification IEC 61156-6. Clause 2 refers to the content of the Capability Manual. Clause 3 refers to the related quality layout. Clause 4 is related to the maintenance of the Capability Approval. NOTE Quality assessment belongs to the negotiation between customers and manufacturers. The following clauses are intended to be a guide when there is a request for a third-party Capability Approval. However, it may also be used as the basis for second-party or self-certification.