“30. As it arises from her gender reassignment, the unequal treatment to which Ms Richards was subject must be regarded as discrimination which is precluded by Article 4(1) of Directive 79/7. 31. The Court has already found that national legislation which precludes a transsexual, in the absence of recognition of his new gender, from fulfilling a requirement which must be met in order to be entitled to a right protected by Community law must be regarded as being, in principle, incompatible with the requirements of Community law (see KB, A reference to the ECJ decision of KB v National Health Service Pensions Agency and Secretary of State for Health,Case C-117/01 [2004] ECR 1-541: see footnote 24 above. paragraphs 30 to 34).”