Yes. Please see the 02/12/21 CalMessage from Lisa Alvarez-Cohen.
"For the duration of the semester, all in-person instructional activities--regardless of whether they are held indoors or outdoors, routinely or on an occasional basis--must take and maintain an attendance record. The instructor, GSI, or staff responsible for any in-person instructional activity must take attendance and maintain it so that if necessary the attendance list can be provided to a contact tracer. Campus contact tracers will be advised to ask students about participation in outdoor instruction. These attendance records do not need to be anything fancy--just whatever system you would normally use for classroom instruction is fine--we just need to ensure that it would be possible to trace everyone who attended in case there should ever be a positive COVID-19 case."