Solve the case: There was an public tender for the construction of plant for the production of telephone cables. Ordering party (client) approved joint proposal of the Polish and Belgian companies. Then a contract was signed. According to the contract, Polish company is obliged to supply the building material and machinery. Belgian company has to provide own technological equipment, install it and also train the staff of the client. Questions: 1. What law would be the most suitable in that case providing that contracting parts did not choose applicable law and potentional conflict should be addressed to a court in the Czech republic? 2. By what legal rules should domestic court proceed?