The 2024 Edition of the Malaysian Civil Procedure Volume I, also known as the White Book, clearly explains how to commence proceedings by using OS. “5/4/5 Example-In the case of Au Poh Weng Lawrence & Anor v Tan Huay Lian Annie [1972–1974] SLR 365; [1972] 2 MLJ 124 it was held that “It is clear that where contentious issues of fact are likely to be involved an originating summons is not a reasonable mode of commencing proceedings even though O 5 r 4 empowers a plaintiff to institute proceedings either by originating summons or by writ”. So also claims of contentious nature by beneficiaries against trustees, charging breach of trust or default in performance of their duties, while properly constituted if commenced either by writ or originating summons, should normally be commenced by writ (see Re Sir Lindsay Parkinson & Co Ltd.’s Settlement Trusts [1965] 1 All ER 609; [1965] 1 WLR 372, Chad; approved in Au Poh Weng Lawrence & Anor v Tan Huay Lian Annie (above)).” “28/0/3 Proceedings may be begun by originating summons where there is unlikely to be any substantial dispute of facts or where the sole or principal question at issue is or is likely to be one of the construction of any written law or of any instrument made under any written law, or of any deed, will, contract or other document, or any other question of law (Order 5 r 4). Proceedings by which an application is to be made to the court or a judge under any written law shall be begun by originating summons (Order 5 r 3). See further paras 5/1/1 and 7/1.” (emphasis added)