The operator of the sea line or the person with spaces on this line is the seller or cheeky slots, it is also called vessel provider. In practice, it is customary to establish a regular sea line of container ships on the basis of a contractual package that includes these different models of slot contracts. The originality of this slot agreement lies in the fact that each of the parties alternates and vice versa supplier and charter. – Sabadie Bertrand, L`Affrètement d`espaces, foreword by Yves Tassel, dissertation 2004, University Press of Aix-Marseille. – Patrick Evrard, Slots agreements, CDMT- Master 2 Maritime and Transport Law, Aix University in Provence, 2005. – Review „French Maritime Law.“ The allocation of partners on each ship on the line is proportional to their total Slots guidance. A, which then has a large allocation, may decide to resell some of its slot machines to D. D can therefore, as part of the A allocation,, load each of the vessels on the line. B enters into a swap agreement with E. In exchange for a portion of its allocation to E, B may charge goods on the third service in which E operates. The spacer will provide slot machines from its ship to the space charterer.

The legal originality of the space charter will then appear. The slot agreement is inserted into a triangular economic relationship with contracts of different types. The swap agreement is a contract whereby two or more shipowners agree to exchange slot machines on ships operating on independent services. These two types of niche agreements are particularly different in the way the contractor has access to the service. While the Slot Charter Agreement is characterized by expensive access to the market by the other party (I), the swap agreement is based on a logic of trading slot machines between the parties (II).