States Parties shall harmonise their national policies, laws and systems with this Protocol and guided, as appropriate, by the Implementation Roadmap annexed to this Protocol. Article 27 ROLE OF MEMBER STATES States Parties shall be responsible for implementing this Protocol. States Parties shall adopt necessary legislative and administrative measures to implement and give effect to this Protocol. States Parties shall harmonize all laws, policies, agreements and immigration procedures and other procedures to ensure compliance with this Protocol. Article 28 ROLE OF REGIONAL ECONOMIC COMMUNITIES Regional Economic Communities following up and evaluating shall be implementation the focal points for promoting, of this Protocol and reporting the progress towards free movement of persons in their respective regions. Each Regional Economic Community shall submit periodic reports to the Commission on the progress of implementation of this Protocol within their respective region. Regional Economic Communities shall harmonise their Protocols, policies and procedures on free movement of persons with this Protocol. Article 29 ROLE OF THE COMMISSION The Commission shall follow up and evaluate the implementation of this Protocol by the Member States and shall through the relevant Specialised Technical Committees submit periodic reports to the Executive Council on the status of implementation of this protocol. The Commission shall in coordination with Member States develop and apply a continental follow up and coordinating mechanism for assessing the status of implementing this Protocol. The follow up and coordinating mechanism shall include the collection and analysis of data nationally and regionally in order to assess the state of the free movement of persons.