Credit cards are NOT billed until after the workshop is run.  Please note the cancellation policy:

Upon registration, a course package will be sent to each participant containing specific seminar location information of the workshop. Companies may substitute registrants without prior notice or penalty. Full refund is available for cancellations up to three (3) weeks prior to seminar date. 50% refund up to one (1) week prior to seminar. Cancellations made less than seven (7) days prior to seminar start date will be charged, but an 80% credit may be applied toward a future program. No-shows receive no credit and will be billed. In the event that the Division of Chemical Health and Safety is forced to cancel a seminar due to lack of registration or other causes, CHAS will notify participants at least seven (7) days in advance by phone and by email. We will notify you by email as soon as we know that the workshops will be held, ie, we have sufficient registrants to present the workshop. If you do NOT receive a confirmation or cancellation notice, you must contact CHAS promptly to determine the workshop status. CHAS does not suggest non-refundable air fares be used due to the potential of seminar cancellation. CHAS will not be responsible for penalties caused by these types of fares in the event of seminar cancellation.