long-range impact of policies initiated during period.of martial law. In Tibet, martial law had been imposed between 7 March 1989 and 1 May 1990 by the State Council of China. During that period the Chinese Government had sent a large number of soldiers and police to Lhasa including a special task force from Chengdu. Even after that period, in June 1990, there was still a heavy uniformed and plain-clothes police presence in Lhasa. 90. During the martial law period any Tibetan wishing to enter Lhasa required a temporary residence permit, which was hard to obtain and valid only for a few days. Yet no restrictions had been imposed on Chinese visitors or businessmen, in flagrant violation of the principle of non-discrimination. E/CN.4/Sub.2/1990/SR.26 page 15 91. Since the lifting of martial law a letter of permission from a Tibetan visitor's local authority was still necessary to enter Lhasa. It was known as the "blue book", cost 30 yuan per month -the average monthly salary in Tibet being some 60 yuan -and had to be renewed after a month. The business permits freely available to Chinese were rarely delivered to Tibetans. 92. During the period of martial law, regular political re-education meetings had been conducted, inter alia, in monasteries, offices and schools. When Tibetans declined to incriminate one another, boxes for anonymous denunciations were installed in schools, offices, monasteries and in the streets. Since the lifting of martial law re-education meetings were still continuing in schools and work units. All Tibetans were still required to attend neighbourhood committee meetings for re-education and denunciation of so-called counter-revolutionaries. Only the boxes had been removed. 93. At the onset of martial law, house-to-house searches had been carried out regularly at night. Such searches still continued. The Chinese were now arresting whole families of suspected counter-revolutionaries and the 
**Analysis**
The text appears to be discussing the human rights situation in Tibet during and after the period of martial law in 1989-1990. It highlights various restrictions and suppressions imposed on the Tibetan population, including restrictions on movement, surveillance, and political re-education. The text also mentions the economic struggles of the Tibetan people, with the average monthly salary being only 60 yuan. Given the focus on human rights, political repression, and economic hardship, it is likely that the text belongs to a category related to social and political issues.

**Category**
Humanitarian aid and relief, Education