4NQvember, heexpressed deepconcern aboutthebanning QfI~~~Moil, andQn 12June1989,hestrongly condemned therenewal ofthestateofemerqency f~rthe fourthconsecutive year,emphasizing thatthat"ruthless anddesperate" actwould further aggravate thecQnflict inSvuthAfrica. On22August1989,heexpressed concern attheincrease inviolent attacks perpetrated against~~ opponents, inparticular against thepeople's poetMzwakhe Mbuliandhisfamily, andatthe ArreRtofUDrleader Mohamme~ ValliMOQse. 208.OntheSUbject ofpolitical prisoners anddetainees, theChairman senta message toZephania MothQpeng, President andfounder ofPAC,ontheoccasion ofhis ~eventy-fifth birthday on9September 1986.Subsequently, on29November 1988,he welcomed Mr.Mothopenq's release afternineyearsofincarceration forhis opposition to~parthei~ (seepara.201). 209.Following theconclusion oftheDelmastrial,inwhichthreeUDrleaders w~re convicted Qf"hightl'eason" andeightothers wereconvicted of"telrorism",thH ActingChairman criticized theuseQfthejUdiciary tosuppress theanti-aJ.ltUt.beJ.Jl opposition. On9February 1989,heexpressed theSpecial Committee'R Rnlidarity ··!:>3-withdetainees whowereonhungerstrikeinprisons throughout thecountry to protest against their"unjustified andprolonged detention without trial". 210.Inresponse todeathsentences, executions andassassinatl~ns, theChairman condemned thedeathsentences pronounced on24January 1989on14individuals who hadbeenpartofthe"Upington 26"case(seeparA.22above). Notingthatthe 14persons hadbeenconvicted solelyonthegroundof"common purpose", t.he Chairman stressed thatthisnotionofcollective responsibility hadlongbeen rejected byinternational law. 211.On23November 1988,theChairman expre3sed a .,"ilarconcern aboutthe s~heduled execution ofPaulTefoSetlaba andconde'.edtheplanned executions of Ndumiso SiloSiphenuka, Mackezwana Menze,Sibusiso Masuku, OupaMbonane and Abraham Mgomezulu. On11.August 1989,theChairman e,.-pressed concern onceagainat thecondition ofpolitical prisoner Robert JOh!lMcBride, whoisstillondeRthrow alongwithmorethanasotherpolitical prisoners. 212.On5May1989,theChairmftncondemnecl theaSB8ss.lnation .in~lohannf!sburg fill 1MayofDr.DavidWebster, aleading SouthAfrican whitedemocrat. Pointluy to hisassassination aBthelatestinRlonglineofasyetunresolvea nssnss\nnt\onR ofanti-apartbill activists, theChairman calledforathorough investiqation into thecircumstances surrounding thiscaseand,further, forani.nternational InqulL'Y intotheactivities oftheincreasing numberofdeathaquaclsinSouth"'frfen (IWO para.30). C.Ac..t..J,!d.tJ..eaJ2.L._t..ue_ Special C.o.mmiUee li\q~in.at. ~tQ~Q.t.fl.UQ1LWJ,.th SwAthAfr~.c.Q 213.TheSpecial Committoe continued itsefforts toperRuade Uoverrunentn tocnase theireconomic, military andotherrelations withSouthAfrica, andwhen appropriate, brought totheGovernments' attntionreports concerning actsor collaboration. Onseveral occasions, it.alsoexprel;sed apJ:lreciation tothose Stateswhichhadadopted measures toendsuchrelations. 214.TheHearings wereorganized bytheIntergovernmental GrouptoMonitor the !;upply andShipping ofOilandPetroleum Products toSouthAfrica, inco-operetiull w..i.ththeSpecial Committee, andwereheldatUnitedNations Heiulquflrt.ers all 12and13August 1989. APanelunderthechairmAnship ofMr.Abdelaziz Al,-w8tterl, Secretary-General oftheOrganization ofArabPetroleum Exporting CountriflS (OAPEC), andconsisting ofplghtexperts inthefield,heardtestimony by 16witnesses onanumberofaspects oftheoilembargo i-lgninRl". HouthAfr t~l'l.'I'ho opening session oftheHearings wasAddressed bytheChairman o(theSpacial Committ~e, Major-GAneral Josoph N.Gorba, andbytheChnirman ofthe Intergovernmental Group, H.E.Mr.TomVraalsen (Norway). Throughout t.hoIIEH,,·jllgfl, thePl'melfocuseditsattention onLheimplementation finde[feeU'.of!!nol1iLUL1tl~1()( t.he,111embargo andontheI'Jedt.oco-ordinate intornational lJ(furt.~; LuBLopthe flowof011andpetroleum product::; toSouthAfrica. AmongthespocHlc lSBucti co.'lGidered w~re:thedependence ofSouthAfrica onoilllnclpetI"olE'Jtun producLn and itsattempts tostockpile1 thedevelopmRnt ofsubstitut.es dill!I.HhUtiveB byHoutll