"You have no basic hours of work as the company enters into no obligation to provide you with work. Nor are you obliged to keep yourself available for work or to agree to attend work on any occasion that the company may request your services."
"... there was some control over the matter by the Respondents in that the casuals were clearly expected to do a certain amount of work each week for the Respondents if called upon and that a failure by a casual to accept work for a period of time would cause the Respondents to remove that casual from the register."