OBS_VALUE: <ul><li><a href=https://www.singpost.com/about-us/investor-relations/annual-reports target=_blank>Sing Post official website(Sing Post. Annual Report FY2021, p. 248. )</a></li><li><a href=https://sso.agc.gov.sg/Act/CoA1967 target=_blank>Companies Act 1967(Act 42 of 1967, adopted on 29 December 1967, revised edition of 2006, last amendment of 01 July 2021)</a></li><li><a href=https://sso.agc.gov.sg/Act/PSA1999 target=_blank>Postal Services Act(Postal Services Act (Ch. 237A)(Original Enactment: Act 42 of 1999)Revised Edition 2000(30th December 2000). Last updated 14 May 2021)</a></li></ul>