123With regard to the first claim, alleging lack of a legal basis, it should be borne in mind that, in accordance with established case-law, Community legislation must be clear and its application foreseeable for all interested parties. The principle of legal certainty forms part of the general principles of Community law, the observance of which it is the Courts task to ensure. It requires that the binding nature of any act intended to produce legal effects must be derived from a provision of Community law which prescribes the legal form to be taken by that act and which must be expressly indicated therein as its legal basis (France v Commission, cited in paragraph 119 above, paragraphs 26 and 30).