Overview of some of the key articles:

Article I stipulates the basic obligations of the Treaty. It prohibits States Parties from carrying out any nuclear explosion. It also prohibits any encouragement of or participation in the carrying out of any nuclear explosion.

Article II provides for the establishment of the Comprehensive Nuclear-Test-Ban Treaty Organization in Vienna to ensure the Treaty's implementation as well as providing a forum for consultation and cooperation.

Article III focuses on national implementation measures.

Article IV elaborates on the global verification regime to monitor compliance with Treaty provisions. The regime is to comprise a global network of monitoring stations (the International Monitoring System), an International Data Centre in Vienna, a consultation and clarification process, On-site Inspections, and confidence-building measures.

Article V outlines measures to redress a situation which contravenes the CTBT provisions and to ensure compliance with the Treaty.

Article VI deals with the settlement of disputes that may arise concerning the application or the interpretation of the Treaty.
Article VII is concerned with amendments to the Treaty.
Article VIII stipulates when a review of the Treaty will take place after its entry into force.

Article IX states that the Treaty is of unlimited duration.

Article XIV is about the Treaty's entry into force. This will take place 180 days after the 44 States listed in Annex 2 to the Treaty have all ratified.

Source: ctbto.org