Believe it or not, women are prohibited from wearing pants in Paris unless she is on a bicycle or riding a horse.  Has been illegal since 1799.  A police chief in 1969 suggested that women in pants was just a fad.

However, you can wear pants with special police permission.  Imagine the lines at the police station.  Could instigate the repeal of the law.

After reading about pants in Paris, I had to do a little more research on clothing restrictions.

Here are a few more interesting laws/guidelines on women's clothing.

The all-male Morehouse College banned the wearing of women's clothes.   Presumably, aimed at cross-dressers.

No stilettos in the workplace in the UK. 

No miniskirts at a college in Brazil.

Pants on women are banned in the Sudan and Somalia.

Women must wear a corset in Norfolk, Virginia.  But women are not permitted to wear a corset in Merryville, Missouri.

Dresses must cover the ankle in Deadwood, South Dakota.

Melbourne, Florida.  No thong bathing suits for anyone over the age of 10 years.