Sometimes, discrimination happens because of more than one reason and sometimes, those reasons interreact in a unique way.
A woman with disabilities might be discriminated against both because of being female and because of those disabilities.
Sometimes grounds of discrimination intersect. For example, a woman of Muslim faith might experience discrimination that neither a man of Muslim faith nor a woman of no faith might experience.
The Convention understands these principals of multiple and intersecting grounds of discrimination and requires governments to ensure that discrimination legislation is explicitly capable of dealing with these forms of discrimination.