MSMA 2000 (or known as MSMA 1) is used as guideline when it comes for IDF coefficients for Sabah and Sarawak. Hence, you may refer to Appendix 13.A : FITTED COEFFICIENTS FOR IDF CURVES FOR 35 URBAN CENTRES.
Appendix 13.A : FITTED COEFFICIENTS FOR IDF CURVES FOR 35 URBAN CENTRES
