This Directive shall not concern:
1. subject to the application of Article 2(1)(c), the classes designated in the Annex to Directive 73/239/EEC;
2. operations of provident and mutual-benefit institutions whose benefits vary according to the resources available and which require each of their members to contribute at the appropriate flat rate;
3. operations carried out by organisations other than undertakings referred to in Article 2, whose object is to provide benefits for employed or self-employed persons belonging to an undertaking or group of undertakings, or a trade or group of trades, in the event of death or survival or of discontinuance or curtailment of activity, whether or not the commitments arising from such operations are fully covered at all times by mathematical provisions;
4. subject to the application of Article 2(3), insurance forming part of a statutory system of social security;
5. organisations which undertake to provide benefits solely in the event of death, w