There were changes last year, which did increase the burden on you
This could be a reason to cancel, and I quote from the site
PCBU and the primary duty of care
Under HSWA, a business or undertaking (PCBU) must look after the health and safety of its workers and any other workers it influences or directs. The business or undertaking is also responsible for the health and safety of other people at risk from its work including customers, visitors, or the general public. This is called the 'primary duty of care'.
Who or what is a PCBU?
A PCBU is a person conducting a business or undertaking. It's a a broad concept used throughout HSWA to describe all types of modern working arrangements which we commonly refer to as businesses.
What is the primary duty of care?
A business or undertaking must ensure, so far as is reasonably practicable, the health and safety of its workers and any other workers who are influenced or directed by the business. This is called the primary duty of care.
Duties for specific businesses
There are responsibilities that apply some to business under certain situations. They expand on and are in addition to the primary responsibilities.