Contract. In the exercise of interpreting contracts, the law requires that the courts exercise a degree ofrestraint. This Law comes into force on the date of its publication in the Official Gazette of the.This Law shall come into force on the date of its publication in the Official Gazette of the Republic of Rwanda. A foreign employee who works in Rwanda is given a written employment contract. Fill the forms. 4. appointment. Ability to the sale of the product for the compensation named in the contract.