See The Rules in the Islamic Shari'a

Aceh is one of the regions that apply the rules of Islamic Shari'a.

the rule is implemented for those who embrace Islam, but for those who embrace other religions are asked to appreciate it.

Aceh which is nicknamed the porch of mecca is still fairly thick and strong Islamic rules are not cracked with the culture as well.
You can see one of these pictures which prohibits unsuitable clothes from entering the place of worship.

if you are interested to see the culture of Islam is still thick, Aceh one of the areas that you must visit.