Information technology. Security techniques. Guidelines for the use and management of trusted third party services
Edition 2002-08-05

Geotechnical investigation and testing. Sampling methods and groundwater measurements. Conformity assessment of enterprises and personnel by third party
Edition 2011-01-31

Intelligent transport systems - ESafety - Interoperability and user choice in eCall aftermarket and third party eCall services (Endorsed by Asociación Española de Normalización in May of 2019.)
Edition 2019-05-01

Non destructive testing - Code of practice for the approval of NDT personnel by recognised third party organisations under the provisions of Directive 97/23/EC (Endorsed by AENOR in August of 2014.)
Edition 2014-08-01

Integrated Services Digital Network (ISDN); Three-Party (3PTY) supplementary service; service description; English version ETS 300186:1993
Edition 1994-01

Integrated Services Digital Network (ISDN); three-party (3PTY) supplementary service; functional capabilities and information flows; English version ETS 300187:1993
Edition 1994-01

Integrated Services Digital Network (ISDN) - Signalling System No. 7 (SS7); ISDN User Part (ISUP) version 4 for the international interface - Part 19: Three-Party (3PTY) supplementary service (ITU-T Recommendation Q.734, clause 2 (1996) and implementors guide (1998), modified) (Endorsement of the English version EN 300356-19 V 4.2.1 (2001-07) as German standard)
Edition 2002-01

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Three-Party (3PTY) supplementary service - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (Endorsement of the English version EN 300188-4 V 1.4.1 (2002-04) as German Standard)
Edition 2002-12

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Three-Party (3PTY) supplementary service - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsement of the English version EN 300188-6 V 1.4.1 (2002-04) as German Standard)
Edition 2002-12