This is from the Institute of Certified Bookkeepers Inc
“With the implementation of the Director Identification Numbers (DIN’s or Director ID’s) pending, it will be important to understand the new obligations for those operating in the capacity of a Director, as failure to apply for a DIN within the required time frame will leave you open to both criminal and civil penalties. It is one of the first initiatives under the Modernising of Business Registers Program and will be a legal requirement. A person only needs to apply once for a Director ID, there is no need to apply each time you are appointed a Director.”
More details here