Although Intellectual Property Law No. 50/2005/QH11 (IP Law) provides that inventions which are against the public morality shall not be protected in Vietnam, the Law does not define which inventions are considered being against the public morality. Therefore, the issue whether an invention shall be refused on the ground that the exploitation of a patented invention is subject to restrictions of the domestic law has been in debate for a long time before the National Office of Intellectual Property of Vietnam (NOIP). The patentability of a gaming system is one example.