The situation of Mayotte proved to be awkward for France: while a significant majority of the local population did not want to join the Comoros in becoming independent of France, some post-colonial leftist governments voiced criticism of Mayotte's ongoing ties to France. Furthermore, the peculiar local administration of Mayotte, largely ruled by customary Muslim law, would be difficult to integrate into the legal structures of France, not to mention the costs of bringing the standards of living to levels close to those of Metropolitan France. For these reasons, the laws passed by the national parliament had to state specifically that they applied to Mayotte for them to be applicable on Mayotte.