At this point of time, most countries (including USA and Singapore) do not require a practitioner to be certified to any standard for challenge courses. As a company, we encourage more training and not certification. We believe that practitioners who spend time upgrading their skills and knowledge would have no problem being certified.
Certification is a process of validating your skills and knowledge. It is part of your training journey and not the end point. So before you decide to invest your money into certification, think about whether it is necessary. Else it may be better to invest in better and more training.