“Prohibition of discrimination The enjoyment of the rights and freedoms set forth in this Convention shall be secured without discrimination on any ground such as sex, race, colour, language, religion, political or other opinion, national or social origin, association with a national minority, property, birth or other status”
“In cases in which the margin of appreciation afforded to States is narrow, as is the position where there is a different in treatment based on sex or sexual orientation, the principle of proportionality does not merely require the measure chosen to be suitable in principle for achievement of the aim sought. It must also be shown that it was necessary, in order to achieve that aim, to exclude certain categories of people… from the scope of application of the provisions at issue…”