This part of IEC 61156 applies to Capability Approval requirements for cables for digital communications in horizontal floor wiring in accordance with generic specification IEC 61156-1-1 and Clause 4 of the sectional specification IEC 61156-5. Clause 2 refers to the content of the Capability Manual. Clause 3 refers to the Quality Plans. 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.