a.         Fifty contact minutes shall equal one continuing education credit hour.  For a continuing education course or activity in which individual segments are less than 50 minutes, the sum of the segments shall be totaled for computation of continuing education credit hours for that continuing education course or activity.

I was surpirsed to not see a minimum time for a course.  I am with ASCE and some of our luncheons may qualifiy for 30 minutes of time depending on the speaker.  However, for any function, less than around 30 minutes providing proof of attendance is very labor intensive.  Creating certificates is difficult.