Summarise in own words:

Article 29: Entities eligible to submit cases to the Court
1. The following entities shall be entitled to submit cases to the Court on any issue or dispute provided for in Article 28:
(a) State Parties to the present Protocol;
(b) The Assembly, the Peace and Security Council, the Parliament and other organs of the Union authorized by the Assembly;
(c) A staff member of the African Union on appeal, in a dispute and within the limits and under the terms and conditions laid down in the Staff Rules and Regulations of the Union;
(d) The Office of the Prosecutor.
2. The Court shall not be open to States, which are not members of the Union. The Court shall also have no jurisdiction to deal with a dispute involving a Member State that has not ratified the Protocol.

Entities eligible to submit cases to the Court include State Parties to the present Protocol, the Assembly, the Peace and Security Council, the Parliament and other authorized organs of the African Union, a staff member of the African Union on appeal, and the Office of the Prosecutor. States that are not members of the Union cannot bring cases to the Court, and the Court also cannot handle disputes involving Member States that have not ratified the Protocol.