While the ACS scheme is entirely voluntary, it is becoming a commercial necessity regardless of the security sector you work in.
The first stage is to register with the SIA-ACS and complete the online self assessment workbook which consists of about 80 question with relation to staff and their training. Once this is completed we ensure all points from the workbook are implemented and records are kept accordingly indicating conformance. ISO 9001 covers 75% of the SIA-ACS requirements, so it may be possible to achieve ISO 9001 and the relevant security codes of practice at the same time as SIA-ACS approval.
Once the system has been implemented an SIA approved assessment body will conduct an external assessment which entails a visit to your premises where they will talk with your staff and customers ensuring that you are a responsible company and that they can validate this.