It's similar to the provisions in the Pension Benefits Standards Act. Clause 21 allows the superintendent to act quickly and name a replacement. They're not subject to the 15-day waiting period.
The 15-day waiting period deals with directions of compliance. For example, if an employer is not making the necessary payments to the administrator, the superintendent will give 15 days' notice that she intends to issue a direction. They can make representation to the superintendent, so this is the process of fairness to the person being issued the direction. Any representation will be considered by the superintendent before a formal direction is issued.