For your perusal please refer to the Government Gazette pertaining to the above, which refers: Effective Date 1 March 2019, or as indicated:
“(except where otherwise indicated for specific grades i.e. in CIT) from 1 March 2019 for employers and employees of the industry or date to be determined by the Minister but not earlier than 1 March 2019 until 29 February 2020.”
For more infomation, Government Gazette 2019