Is it illegal for mengzi city Natural Resources Bureau not to wear work clothes when performing tasks?

Illegal. According to the "Measures for the Administration of Clothing of mengzi city Natural Resources Bureau", all personnel of Natural Resources Bureau must wear work clothes, including those from administrative, technical, service and production departments. Work clothes are purchased by the Natural Resources Bureau, not necessarily by yourself. Those who don't wear work clothes are regarded as violating discipline and given a warning.