What does 6.3.4 require?

The body records and retains details of its investigation of subcontractor competence and conformity with the applicable requirements, and maintains a register of all subcontractors.

ISO/IEC 17020:2012 Requirements for the operation of...

Other controls in Clause 6: Resource requirements (personnel, facilities and equipment, subcontracting) – ISO/IEC 17020:2012 Requirements for the operation of various types of bodies performing inspection

6.1.1 Defined and documented competence requirements
6.1.10 Records of monitoring, training, experience and authorisation
6.1.11 Remuneration not influencing results
6.1.12 All personnel who could influence inspection act impartially
6.1.13 Confidentiality by all personnel including subcontractors
6.1.2 Sufficient competent persons employed or contracted
6.1.3 Qualifications, knowledge and understanding of deviations
6.1.4 Duties, responsibilities and authorities made clear

Query this from an agent

The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.

MCP endpoint All ISO/IEC 17020:2012 Requirements for the operation of various types of bodies performing inspection controls