Ethiopia

1. State and religion are separate.
2. There shall be no state religion.
3. The state shall not interfere in religious matters and religion shall not interfere in state affairs. (Art. 11)

…
4. In accordance with provisions to be specified by law, a law giving recognition to marriage concluded under systems of religious or customary laws may be enacted.
5. This Constitution shall not preclude the adjudication of disputes relating to personal and family laws in accordance with religious or customary laws, with the consent of the parties to the dispute. Particulars shall be determined by law. (Art. 34)

…
5. Pursuant to sub-Article 5 of Article 34 the House of Peoples’ Representatives and State Councils can establish or give official recognition to religious and customary courts. Religious and customary courts that had state recognition and functioned prior to the adoption of the Constitution shall be organized on the basis of recognition accorded to them by this Constitution. (Art. 78)