Question

Must Articles 18 TFEU and 21 TFEU be interpreted as precluding legislation of a Member State which provides that the income of a person resident in another Member State, who receives all of his or her income from the first Member State but who does not hold the nationality of the second Member State, is taxed only in the first Member State, that person being thereby excluded from the benefit of the tax advantages offered by the second Member State?

Conclusion

Articles 18 TFEU and 21 TFEU do not preclude a tax regime resulting from a convention for the avoidance of double taxation concluded between two Member States, pursuant to which the powers of taxation of those States in relation to the taxation of retirement pensions are allocated according to whether the recipients of those pensions were in employment in the private sector or the public sector and, in the latter case, according to whether or not they are nationals of the Member State of residence.