the purpose of a suspension at the time frame of the infraction ( instead of right away) is to give the penalty the maximum impact.
Hearing and suspensions are given year round. For example; in my state, someone receiving a suspension for an infraction at a July show. If the hearing was in December there would be no punishment except for the fine. We have no shows in December. The penalty during the show season, usually at the same time frame as the show where the infraction occurred, costs the recipient further in lost business, opportunity etc.