Exercise common sense and discretion in dress and behaviour, and dress conservatively. Women may wear dresses and skirts, provided they cover the shoulders and knees; shorts, short skirts and tight and revealing clothing are considered inappropriate.
Whilst there is no legal requirement to wear the hijab, women shouldn't wear tube tops and skimpy outfits. In general the covering up of the shoulders, thighs and abdomen is appropriate for both genders - tank tops, spaghetti straps, or excessively small shorts are likely to garner unwanted attention.
Exercise particular care in your behaviour with others, especially officials, to avoid offending local sensitivities. Verbal insults and obscene gestures are impolite and may be considered a criminal act.