Billing, including the following matters:
(a) if the bills are to be issued, the frequency of billing (including any
options available to customers);
(b) the charges (if any) for particular billing options;
(c) the standard way in which bills will be issued (including any options
available to customers);
(d) the ways for paying a bill;
(e) the policy (if any) in relation to late billing;
(f) the penalty (if any) for late payment of a bill.