neighborhoods and villages received instructions to verify the seals on all radio sets. As North and South Korea use different television systems (PAL and NTSC, respectively), it is not possible to view broadcasts across the border between the two countries; however, in areas bordering China, it has reportedly been possible to receive television from that country. A United Nations envoy reported that any North Korean citizen caught watching a South Korean film may result in that person being sent to a labor camp. Minority rights North Korea's population is one of the world's most ethnically homogeneous, and immigration is almost non-existent. Among the few immigrants that have willingly gone to North Korea are Japanese spouses (generally wives) of Koreans who returned from Japan from 1955 to the early 1980s. These Japanese have been forced to assimilate, and for the most part, the returnees overall are reported to have not been fully accepted into North Korean society (with a few exceptions, such as those who became part of the government), and instead ended up on the fringes. Foreigners who visit the country are generally strictly monitored by government minders and are forbidden to enter certain locations. In 2014, after the United Nations Human Rights Council published a report on human rights in North Korea advising a referral to the International Criminal Court, the official Korean Central News Agency responded with an article that included homophobic insults against report author Michael Kirby, who is openly gay. The KCNA's article went on to state that gay marriage "can never be found in the DPRK boasting of the sound mentality and good morals, and homosexuality has become a target of public criticism even in Western countries, too. In fact, it is ridiculous for such gay to sponsor dealing with others' human rights issue." Disability rights As a state party to the International Covenant on Economic, Social and Cultural Rights (ICESCR) and the Convention on the Rights of the Child (CRC), North Korea has international obligations to refrain from discriminating against its people based on disability (among other criteria). Under Article 2 of the CRC, "States Parties shall respect and ensure the rights set forth in the present Convention to each child within their jurisdiction without discrimination of any kind, irrespective of the child's or their parent's or legal guardian's race, colour, sex, language, religion, political or other opinion, national, ethnic or social origin, property,