Summary, 2nd Part

The study opposes the idea of "no rule of international law" on petroleum cross-boundary fields question. It investigates customary international law on mining and petroleum rights, and it points out and deals with international responsability of States in the matter of divided hydrocarbon deposits.
The study intends to lay greater stress on the need for complementary notions from internal law to be included up in the making of the unity of deposit concept, showing how a complementary notion does play an important role in making it practical.
This is why the basic material concept proposed in the study is "gisement divisé" (divided deposit). It should be emphasized that this is done in order to show that the unity of deposit concept does not deal only with economic considerations but has to do also with security considerations, such as protection of human life on mining sites.
The study takes on interest in technical aspects regarding production of hydrocarbon reservoirs and mining exploitation, both divided by international boundaries. It comes close to relations between law and engineering.
Models of production for hydrocarbon divided deposits in international law and models of ownership formulas for reserves in such situation are determined.