A group of people has filed a lawsuit challenging a civil law that effectively stops women from keeping their surnames when they marry.
The 113-year-old law requires married couples to choose just one surname for the man and woman to share, and custom means it is usually the man's.
The lawsuit alleging this violates the right to equality under the Constitution is drawing attention to the rights of women in a country where they are underrepresented in corporate, academic and political ranks and still expected to do most of the homemaking and child-rearing.
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