(1) The AER may—
(a) request the ESC to amend the Gas Distribution System Code; or
(b) until the specified day, request the ESC to amend ESC guideline No. 17.
(2) On receiving a request under subsection (1), the ESC may, after consulting with the AER, amend the Gas Distribution System Code or ESC guideline No. 17 (as the case may be).