The school, located west of Paris, serves children ages 2-3, often from underprivileged families.
The Court of Cassation had ruled in favor of Ms. Afif in March, overturning decisions by a lower court and a labor court.
The French government's Observatory of Laicit, which helps guide official action regarding respect for secularism, noted after the ruling that it had recommended a circular containing guidelines outlining what the law allows and what it forbids. The Observatory said it will be issuing its own guide on the issue.
Numerous sectors in France, from political parties to professionals such as social workers, fear the country's constitutionally guaranteed value of secularism is being undermined by immigration and its increasingly diverse citizenry, particularly Muslims.
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