means the supply for consideration of a utility or service, other than credit or access to credit, or the supply of such a utility or service combined with the supply of any goods that are essential for the utilisation of that utility or service by the consumer, with the intent that, so long as the agreement to supply that utility or service remains in force, the supplier will make the service continuously available to be used, accessed or drawn upon—
| (a) | from time to time as determined by the consumer; and |
| (b) | with any frequency or in any amount as determined, accessed, required, demanded or drawn upon by the consumer, subject only to any total use or cost limits set out in the agreement; |