Here is the link--
https://goomer.ncaa.org/wdbctx/LSDBi/LSDBi.LSDBiPackage.DisplayBylaw?p_Division=1&p_IndexName=ManualIndex&p_PkValue=18732&p_TextTerms=(basketball)%20AND%20(schedule)%20AND%20(games)&p_TitleTerms=ThisIsADummyPhraseThatWillNotBeDuplicated&p_BylawNum=17.5.5.1&p_Text=1_060502161504.HTML&p_ViewAdopted=Adopted&p_BylawType=0&p_ProposedDate=&p_AdoptedDate=27-APR-2006&p_EffectiveDate=01-AUG-2006&p_HeadFoot=1&p_CallCount=1
The maximum number of games allowable to schedule is 27 for teams in conferences with post-season tournaments, and 29 for teams without post-season tournaments.
Also, each team can participate in one NCAA qualifyed regular-season multiple-team event (tournament) in addition to the 27 scheduled games, and play up to 4 additional games in that tournament.
Here is the rule addressing these in-season tournaments--
https://goomer.ncaa.org/wdbctx/LSDBi/LSDBi.LSDBiPackage.GetBylawToDisplay?p_Division=1&p_Key=18733&p_Bylaw=17.5.5.1.1&p_ViewAdopted=Adopted&p_TextTerms=(basketball)%20AND%20(schedule)%20AND%20(games)&p_TitleTerms=ThisIsADummyPhraseThatWillNotBeDuplicated&p_HeadFoot=1&p_CallCount=1
Cut and paste these URL's as the links won't work.