Saudi Arabia is trying to ban child marriage through new regulations, but loopholes are leaving young girls in the deeply conservative kingdom unprotected, campaigners said Thursday.

The Shura Council, a top advisory body to the government, approved regulations on Wednesday to prohibit marriage for girls and boys under 15, and those under 18 will need approval from a specialized court, according to council member Lina Almaeena.

Currently, the conservative Muslim country does not have a minimum legal age for marriage, and women live under a guardianship system where they must have permission from a male relative to marry, work and travel.