The IOC Exec Board added marijuana and other "social drugs" to its list of banned substances, according to Athelia Knight of the WASHINGTON POST. The move comes after Canadian snowboarder Ross Rebagliati tested positive in Nagano but was allowed to keep his medal. IOC VP Dick Pound: "The IOC has decided in the case of social drugs we should take a stand, and Olympic athletes should be put to a somewhat higher standard than society in general." The IOC is meeting in Sydney and said details of the policy must still be worked out (WASHINGTON POST, 4/28). OTHER NOTES: IOC President Juan Antonio Samaranch took a tour of the half-completed Olympic Stadium in Sydney and afterward said, "This is the most impressive stadium I have seen in my life." Construction is expected to be completed in March '99 (USA TODAY, 4/27)....In speaking about Nagano, IOC VP Pound yesterday attributed the worst ratings for the Winter Games in 30 years to "the time difference, the programming decisions, the presentation of the program by CBS and possibly the results of the American team." CBS had no comment on Pound's remarks (Toronto GLOBE & MAIL, 4/28).