Section 18 of the Principal Act is amended as follows:(a) by omitting from subsection (1) "Aurora Retail" and substituting "a regulated offer retailer" ;(b) by omitting from subsection (1) "tariffs and charges" and substituting "standing offer prices" ;(c) by omitting from subsection (2)(b) "Aurora Retail" and substituting "a regulated offer retailer" ;(d) by omitting from subsection (2)(c) "tariffs and charges" and substituting "standing offer prices" ;(e) by omitting from subsection (2) "tariffs and charges" second occurring and substituting "standing offer prices" ;(f) by inserting the following subsection after subsection (2) :(3) In this section regulated offer retailer means a person declared to be a regulated offer retailer in an order made under section 38A(1) of the Electricity Supply Industry Act 1995 .