National legislation in Romania

Law no. 167/2003 for the approval of the Government Ordinance no. 81/2000.
Gov. Ordinance no. 81/2000 regarding the certification of the registration of road vehicles registered in the technical norms regarding road safety, environmental protection and the use according to their destination, by periodic technical inspection
Law no. 373/2005 regarding the approval of Government Ordinance no. 40/2005
Gov. Ordinance no. 40/2005 for amending and completing the Gov. Ordinance no. 81/2000
National regulations referring to periodic technique (RNTR 1/2005),

EU legislation

Directive 2014/45/EU of the European Parliament and of the Council of 3 April 2014 on periodic roadworthiness tests for motor vehicles and their trailers and repealing Directive 2009/40/EC Text with EEA relevance (with effect from 20 May 2018)
This Directive establishes minimum requirements for a regime of periodic roadworthiness tests of vehicles used on public roads. This applies to vehicles with a design speed exceeding 25 km/h of the following categories: M1, M2 and M3 (passenger motor vehicles, N1, N2 and N3 (motor vehicles for the carriage of goods, O3 and O4 (trailers over 3,5 tonnes) L (two or three wheels over 125cm3).