The correct answer is: B. The contract for supply lasts for a minimum period of 3 months.
A continuous supply of goods is a supply of goods that is made over a period of time and is not completed in a single transaction. In order to be considered a continuous supply, the contract for supply must last for a minimum period of 3 months. This is because a continuous supply is considered to be a single supply, even if it is made over a period of time, if the contract for supply lasts for a minimum period of 3 months.
Option A is incorrect because the goods do not need to be notified by the Commissioner in order for a supply to be considered a continuous supply.
Option C is incorrect because the supply does not need to be made by means of a wire, cable, pipeline or other conduit in order for it to be considered a continuous supply.
Option D is incorrect because the supplier does not need to invoice the recipient on a regular or periodic basis in order for a supply to be considered a continuous supply.