OBS_VALUE: <ul><li><a href=https://www.legislation.gov.au/Details/F2016C00283 target=_blank>Telecommunications Numbering Plan 2015(Telecommunications Numbering Plan 2015,  5 April 2015, Last updated on 21 March 2016, Chapter 10 Number portability)</a></li><li><a href=https://www.legislation.gov.au/Details/C2023C00087 target=_blank>Telecommunications Act 1997(Act No. 47 of 1997, Date of Assent: 22 April 1997, last amended on 12 December 2019, Part 22)</a></li></ul>