Can I take this course if I am not employed by a company?
No, the Transportation of Dangerous Goods certificate MUST be signed by you, the employee, and your employer to be valid.
My current certificate expires in three months, should I wait to take this training?
If recurrent training is completed within the final three months of validity of the previous training, the period of validity extends from the month on which the recurrent training and assessment was completed until 24 months from the expiry month of that previous training and assessment.