Freedom of religion, despite being guaranteed in the constitution, faces many restrictions in Malaysia. Based on the Malaysian constitution, a Malay in Malaysia must be a Muslim, and Malays cannot convert to another religion. Islamic religious practices are determined by official Sharia law, and Muslims can be fined for not fasting or refusing to pray. Women are increasingly pressured to wear head coverings. Non-Malays are more free to shift between religions. Attempts by Muslims to convert to other religions are punished by state governments, with punishments ranging from fines to imprisonment. The federal government does not intervene in legal disputes over conversion, leaving it to the courts. The secular courts of Malaysia have ruled they do not have the authority to decide these cases, referring them to the Syariah courts. These Islamic courts have unanimously ruled that all ethnic Malays must remain Muslims. Even non-Malays who have converted to Islam are not allowed to leave Islam, and children born to Muslim parents are considered to be Muslims. A non-Muslim who wishes to marry a Muslim must first convert to Islam.