A person exceeds the 10% threshold in respect of an electricity business if the person—
(a) has more than 10% of the control rights in the business; or
(b) has more than 10% of the equity return rights in the business; or
(c) is one of 2 or more associates who, in aggregate, have more than 10% of the control rights in the business; or
(d) is one of 2 or more associates who, in aggregate, have more than 10% of the equity return rights in the business.