The Australian Standard (AS) for Corporate Governance of Information and Communication Technology (AS 8015-2005) defines 'official' guidelines that Australian companies will follow if they are looking to introduce effective governance in their IT departments.
AS 8015 defines processes, terms/definitions (vocabulary) and an overall model.
AS 8015 also lists some guiding principles. These can be summarized as follows:
Establish clear responsibilities
Plan IT in a way that will provide optimal support to the organization
Use valid process to acquire IT
Seek optimal performance in IT systems
Seek conformance with appropriate rules
Take human factors into consideration