"It is, however, for the Court to determine in the last resort whether the requirements of Article 3 of Protocol No. 1 have been complied with; it has to satisfy itself that the conditions imposed in the right to vote and to stand for election do not curtail the rights in question to such an extent as to impair their very essence and deprive them of their effectiveness; that they are imposed in pursuit of a legitimate aim; and that the means employed are not disproportionate (see Mathieu-Mohin and Clerfayt, cited above, § 52). In particular, any conditions imposed must not thwart the free expression of the people in the choice of the legislature – in other words, they must reflect, or not run counter to, the concern to maintain the integrity and effectiveness of an electoral procedure aimed at identifying the will of the people through universal suffrage (see Hirst (no. 2), cited above, § 62). Equally, once the wishes of the people have been freely and democratically expressed, no subsequent amendment to the organisation of the electoral system may call that choice into question, except in the presence of compelling grounds for the democratic order. "