text: agenda item 3, which related to: (a) the possible scheduling of six substances under the provisions of the Single Convention (E/CN.7/1990/4, paras. 1-3); (b) the possible rescheduling of one substance and the scheduling of four substances under the provisions of the Convention on Psychotropic Substances, 1971 (E/CN.7/1990/4, paras. 4-15); and (c) the indexing of the E/NL. series of national laws and regulations (E/CN.7/1990/4/Add.1 and E/NL.1986/Index). A. Consideration of recommendations for scheduling and rescheduling under the international drug control treaties Single Convention on Narcotic Drugs. 1961. as amended by the 1972 Protocol Amending the Single Convention on Narcotic Drugs. 1961 Alpha-methylthiofentanvl. para-fluorofentanyl. beta-hvdroxyfentanyl. beta-hydroxy-3-methylfentanyl. thiofentanyl and 3-methylthiofentanyl 43. The Commission had before it, in document E/CN.7/1990/4, six notifications from the Director-General of the World Health Organization (WHO) recommending that six substances, alpha-methylthio fentanyl (N-ri-ri-methyl-2-(2 -thienyl)ethyl]-4-piperidyl]propionanilide), para-fluorofentanyl (4'-fluoro-N -(1-phenethyl-4-piperidyl]propionanilide), beta-hydroxy fentanyl (N-[1-(beta -hydroxyphenethyl)-4-piperidyl]propionanilide), beta-hydroxy-3-methyl fentanyl (N-[l-(beta-hydroxyphenethyl)-3-methyl-4-piperidyl]propionanilide), thiofentanyl (N-[l-[2-(2-thienyl)ethyl]-4-piperidyl]propionanilide) and 3-methylthiofentanyl (N-[3-methyl-l-[2-(2-thienyl)ethyl]-4-piperidyl] propionanilide), should be included in Schedules I and IV of the Single Convention. 44. Document E/CN.7/1990/4 also contained the comments received by the Secretary-General from Governments relevant to the possible scheduling of the six substances. The observer for WHO made a statement concerning the notifications before the Commission and drew attention to the fact that the twenty-sixth report of the WHO Expert Committee on Drug Dependence 6/ was available to the Commission. He expressed his appreciation for the efficient co-operation WHO had always received from the Division of Narcotic Drugs. 45. Most representatives expressed their support for WHO recommendations to include the above-mentioned analogues of fentanyl in Schedules I and IV, while some indicated that the proposal should be deferred and that further consideration should be given by WHO to the question of their scheduling. 46. Some representatives pointed out that, should the six fentanyl analogues be placed under control, other analogues of fentanyl could easily be designed 
analysis: This text appears to be discussing the regulation of certain substances under international drug control treaties, specifically the Single Convention on Narcotic Drugs and the Convention on Psychotropic Substances. The focus is on the scheduling and rescheduling of these substances, which suggests that the category should be related to health, law enforcement, or international cooperation.