Each enforcement authority shall prepare and publish a statement of policy with respect to the imposition of penalties and the determination of their amount.

In deciding whether to impose a penalty, and in determining the amount of any penalty, in respect of a contravention or failure an enforcement authority shall have regard to his or its statement of policy most recently published at the time when the contravention or failure occurred.

An enforcement authority may revise his or its statement of policy and where he or it does so shall publish the revised statement.

Publication under this section shall be in such manner as the enforcement authority considers appropriate for the purpose of bringing the matters contained in the statement of policy to the attention of persons likely to be affected by them.

An enforcement authority shall undertake such consultation as he or it considers appropriate when preparing or revising his or its statement of policy.