| 45 | Council Directive 66/45/Euratom of 27 October 1966 amending the Directives laying down the basic standards for the protection of the health of workers and the general public against the dangers arising from ionising radiations | 27 Oct 1966 |
| 162 | Council Directive 66/162/EEC of 28 February 1966 concerning the attainment of freedom of establishment and freedom to provide services in respect of activities of self-employed persons engaging in the provision of electricity, gas, water and sanitary services (ISIC Division 5) | 28 Feb 1966 |
| 400 | Council Directive of 14 June 1966 on the marketing of beet seed (66/400/EEC) | 14 Jun 1966 |
| 401 | Council Directive of 14 June 1966 on the marketing of fodder plant seed (66/401/EEC) | 14 Jun 1966 |
| 402 | Council Directive of 14 June 1966 on the marketing of cereal seed (66/402/EEC) | 14 Jun 1966 |
| 403 | Council Directive 66/403/EEC of 14 June 1966 on the marketing of seed potatoes | 14 Jun 1966 |
| 404 | Council Directive 66/404/EEC of 14 June 1966 on the marketing of forest reproductive material | 14 Jun 1966 |
| 454 | Council Directive 66/454/EEC of 28 July 1966 amending Article 22 of the Council Directive of 26 January 1965 on the approximation of provisions laid down by law, regulation or administrative action relating to proprietary medicinal products | 28 Jul 1966 |
| 600 | Council Directive 66/600/EEC of 25 October 1966 amending the Council Directive of 26 June 1964 on animal health problems affecting intra-Community trade in bovine animals and swine | 25 Oct 1966 |
| 601 | Council Directive 66/601/EEC of 25 October 1966 amending the Council Directive of 26 June 1964 on health problems affecting intra-Community trade in fresh meat | 25 Oct 1966 |