The Legal Affairs and External Relations Bureau (LEB) provides advice and assistance on legal and external relations matters generally and in support of ICAO’s Strategic Objectives, to the ICAO Member States, the Governing Bodies, the President of the Council, the Secretary General, and other ICAO Bureaus and Regional Offices. With regard to legal matters, the Bureau is responsible for: the provision of legal advice to the Governing Bodies and the Secretariat on any issue of law, in particular on international law and air law; the general development of air law; the review of all agreements and contracts; and the performance of the treaty depositary functions of the Organization. The Bureau is the focal point for all matters related to the functions of the Supervisory Authority of the International Registry, which was established pursuant to the Convention on International Interests in Mobile Equipment (Cape Town, 2001) (Cape Town Convention) and the Protocol to the Convention on International Interests in Mobile Equipment on Matters specific to Aircraft Equipment (Cape Town 2001) (Aircraft Protocol). With regard to external relations matters, the Bureau is responsible for: maintaining close and harmonious working relations with Member States; serving as focal point for the Organization’s relations with the Host Government; carrying out liaison and protocol functions; and monitoring and providing policy guidance and advice on current political events which might affect ICAO.