Sertifiseringsorganet for sakkyndig virksomhet AS is appointed by the The Labour Inspection Authority to provide certification services for Enterprises of Competence for inspection and certification of specified Work Equipment; as Cranes and Lifting equipment, Loose gear, Fork lifts and similar machines, Scaffolding, Personnel Lifters and Earth moving equipment; see full list here.
This as per Administrative Regulations to the Workers Protection Act, Regulation, Order no. 703.
Further, Enterprises of Competence certified by Sertifiseringsorganet are recognized as competent for inspection of lifting equipment in the petroleum sector, as per Norsok R-002, Norsok R-003 and Norsok

Please consult Sertifiseringsorganet for further information on this subject.

Labour Inspection Authority  (Arbeidstilsynet)

Regulation regarding performance of work

Norsok R-002:2012; Lifting Equipment

Norsok R-003:2004; Safe Use of Lifting Equipment

Norsok R-005: 2008; Safe use of lifting and transport equipment in onshore petroleum plants