Problem Solving-Staff wearing fashion dresses in the office

Problem Solving-Staff wearing fashion dresses in the office,

One of my client is having a software manufacturing company. There are more than 400 girls and boys working in the company. Lately the company has started facing a new problem .
Some of the girls have started wearing fashion designer dresses in the office which are very provocative. They dress up like Fashion models .They dress up like Fashion models They also wear fashion Jewellery , fashion accessories at the time of duty. Their Dressing this way is converting the office into a fashion Show. at the time of duty. Their Dressing this way is converting the office into a fashion Show.

I request the readers to suggest the various measures to control the problem which is showing effect the productivity of the company