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Rules Change Panel


All proposed modifications to the Market Rules are reviewed by the Rules Change Panel (RCP). Thereafter, the RCP makes a recommendation to the EMC Board and the decision of the EMC Board is submitted to Energy Market Authority for endorsement.

Members of the RCP represent a wide range of experience from the electricity industry and the financial industry.

The current 3-year RCP term is effective from 1 January 2018 to 31 December 2020. 

The RCP consists of 15 members:


Toh Seong Wah
Toh Seong Wah is the Chief Executive Officer of EMC. He joined EMC in August 2011 as the head of the Market Operations and Information Technology (MOIT) teams, which provide the resources and support to ensure that the trading, pricing and settlement in the NEMS are in accordance with the Market Rules. Seong Wah brings with him extensive experience from the public sector. Prior to joining EMC, he was involved in several large scale whole-of-government infrastructure and technology initiatives, including the Standard ICT Operating Environment (SOE) which was the largest government infocomm programme at the time with a project value of S$1.3 billion. Seong Wah graduated from Nanyang Technological University with an honours degree in Electrical Engineering.

Employee of EMC

Henry Gan
Henry Gan is currently EMC’s Senior Vice President, Market Operations. He oversees the market operations of the NEMS and ensures that market operations are consistent with the strategic direction of the organisation. He leads a team of customer driven staff to plan and implement solutions that support an efficient and reliable market. This includes pricing and information operations, settlement and clearing operations as well as the management of ancillary services contracts. Henry has significant industry and technical experience and has been with EMC since the start of the market. Prior to joining EMC in early 2001, he was Market Operations Manager for the Singapore Electricity Pool with PowerGrid which he joined in 1996. Henry graduated in 1996 from Nanyang Technological University with an Honours degree in Electrical Engineering.

Representative of the PSO

Soh Yap Choon
Soh Yap Choon is the Deputy Chief Executive (System Operation) of the Power System Operation Division (PSOD) of EMA. He heads the Power System Operator which arranges for the secure operation of the power system in Singapore and ensures the security of supply of electricity to consumers. PSOD's Power System Control Centre (PSCC) is the nerve centre of the electricity generation and transmission system. The Division operates mission critical Energy Management Systems, and carries out power system studies and assessments of the impact of new generating plants as well as transmission expansion plans of electricity and gas transmission licensees. Yap Choon holds a Bachelor Degree (Hons) in Electrical & Electronic Engineering from Nanyang Technological University.

Representatives of the Generation Licensee class of market participant

Marcus Tan Yam Ngee
Marcus Tan is Senior Vice President (Trading & Portfolio Management) and a member of the Executive Management Team of Senoko Energy Pte Ltd ("SEPL"), where he is responsible for electricity trading in the wholesale and futures markets, formulating trading strategies, and optimising the company's portfolio of power, oil and gas contract positions. Marcus has more than 20 years of experience in the energy market, starting as an electrical engineer in 1997 and joining the commercial group of SEPL in 2001 when the department was expanding to operate in the NEMS which was launched in 2003. Between 2012 and 2018, Marcus pioneered the set-up and became a senior management team member of the commercial group of Singapore's first greenfield power generation plant owned by a consortium of international investors. During that period, he was responsible for the power and gas market operations and led the development of the company's trading strategies which included fuel and foreign currency hedging under his portfolio. Marcus holds a Bachelor (Hons) Degree in Electrical & Electronic Engineering from the University of Manchester Institute of Science and Technology, and a Master Degree in Applied Finance from the Macquarie University.

Teo Chin Hau
Teo Chin Hau is Senior Manager, Portfolio Management at PacificLight Power Pte Ltd. He currently oversees operation of both the electricity and gas markets and management of strategic fuel, in addition to fuel and foreign exchange hedging. He has over 10 years of experience in the Singapore energy industry, having previously been involved in wholesale trading, retail pricing, gas and electricity regulatory tariff setting, regulatory management and portfolio hedging. Chin Hau holds a Bachelor of Engineering (Mechanical Engineering) from the National University of Singapore.

Tony Tan Kia Shuan
Tony Tan is Assistant Vice President (Trading & Regulation) of Tuas Power Generation Pte Ltd. He is responsible for formulating trading strategies and regulatory matters. He reports to the President and CEO and is a member of the Senior Management Team. He joined the company in 2004 and was previously heading the Risk Management Department until 2016. He was also a member of the Technical Working Group (TWG) for 8 years. Tony holds a Bachelor of Social Sciences in Economics with 2nd Class Honours (Upper Division) from the National University of Singapore and risk management certifications in Associate Risk Management (ARM), Certified Risk Management Professional (CRMP) and Financial Risk Manager (FRM).

Representative of the Transmission Licensee class of market participant

Carol Tan
Carol Tan is Vice President (Regulatory Management) of Singapore Power (SP) Ltd. She is responsible for managing the regulatory affairs in relation to SP’s regulated transmission and distribution business in Singapore. Prior to joining SP, Carol held roles ranging from investments and mergers and acquisitions, private equity, project finance to greenfield development of infrastructure and renewable energy assets throughout Asia. She attended the Executive Development Program from Chicago Booth School of Business and is a Chartered Financial Analyst. She also holds a Masters of Engineering (Electrical) degree from the National University of Singapore.

Representatives of the Retail Electricity Licensee class of market participant

Sean Chan Sik Lung
Sean Chan is the Head (Regulation & Risk Management) at Keppel Infrastructure Holdings Pte Ltd.  He has more than 20 years of experience in utilities industry, with involvement in liberalization and development of Singapore electricity and gas markets, and managing the associated regulatory, market and operational risks faced by utilities. He was also actively involved in the regulatory reset for the Victorian electricity transmission company in Australia in 2002. Prior to joining the utilities industry in Singapore, Sean was a Director managing a marine consultancy firm in Hong Kong.  A Chartered Engineer (UK), Sean holds a B.Eng (Hons) in Mechanical (Marine) Engineering from John Moors University (UK) and a MBA from University of Sheffield (UK).

Senthil Kumar
Senthil Kumar has more than 15 years of direct experience in the electricity market of Singapore, mainly in the retailing of electricity to consumers. He has seen the liberalisation and evolution of the market for the large Commercial and Industrial consumers to the present Residential consumers. Senthil joined I Switch Pte Ltd to set up and kickstart its electricity retail business. As General Manager, he is involved in all facets of the business which currently serves more than 1,000 commercial consumers and 55,000 residential consumers. He is analytical with a keen eye for details. Senthil holds an Engineering degree from Singapore and an MBA from the US.

Representative of the wholesaler electricity market trader class of market participant

Matthew Yeo Tze Han
Matthew Yeo is the Head of Trading, Regulations and Strategy for Sembcorp Cogen Pte Ltd (SembCogen). As general manager of the Sembcorp Group’s power generation business in Singapore, he is responsible for SembCogen’s financial and business performance, regulatory management and spearheads its trading strategies, both in the National Electricity Market of Singapore as well as the Electricity Futures Market. He also leads Sembcorp’s business development activities in Singapore, Myanmar and Indonesia. He previously worked on Sembcorp’s second LNG Aggregator bid and performed an asset management role for Sembcorp’s power operations worldwide. Prior to joining Sembcorp, Matthew worked as a management consultant specializing in oil and gas at the international oilfield services company Schlumberger Limited. He also served as Deputy Director for Industry Development at the Energy Market Authority, developing public-private partnership funds for energy projects, and Assistant Director in the Ministry of Trade and Industry, driving the liberalization of Singapore’s gas market. Matthew graduated with a Bachelor’s (First-Class Honours) and Master’s Degree in Engineering from the University of Cambridge.

Representative of the Market Support Services Licensees

Ho Yin Shan
Ho Yin Shan is Head (Operations) in SP Services Ltd. Prior to assuming her current role in 2016, she was involved in Network Planning, Asset Management and Procurement functions within Singapore Power. Yin Shan holds both the Bachelor of Engineering (Electrical) as well as Master of Engineering from the National University of Singapore. She also attended the International Management Program at the MIT Sloan School of Management in Massachusetts, the United States of America in 2007. She is a registered Professional Engineer with the Professional Engineers Board, Singapore.

Representatives of consumers of electricity in Singapore

Dr Toh Mun Heng
Dr Toh Mun Heng has been a member of the Central Committee of the Consumers Association of Singapore since 1995. He served in the CaseTrust Advisory Council and Fair Trading Legislation Committee, which eventually led to the passing of the Consumer Protection (Fair Trading) Act in 2004. Currently, Dr Toh serves as the Chairperson of CASE Endowment Fund Board of Trustee and Assistant Treasurer of CASE. He is consulted by numerous governmental and international organisations which include Agency for Science and Technology Research, ASEAN Secretariat, Civil Aviation Authority of Singapore, InfoComm Development Authority, Singapore, Ministry of Finance, Ministry of Health, Ministry of Manpower, Ministry of Trade and Industry, UN ESCAP and the United Nations and many others. He obtained his doctoral degree in Economics and Econometrics from the University of London, London School of Economics. He is currently an Associate Professor, Department of Business Policy, School of Business, National University of Singapore as well as a Research Assistant in the Ministry of Environment. He researches and writes prolifically in many topics including Household Economics, Manpower/Education Planning and Population Studies and Productivity Measurement and Analysis in Asia Pacific Economies.

Fong Yeng Keong
Mr YK Fong is the Purchasing Manager at Petrochemical Corporation of Singapore (Pte) Ltd (PCS). He has 26 years of experience in PCS and is currently responsible for procurement of all plant, equipment, spares, major utilities and services from external sources to facilitate smooth and efficient operation and maintenance work. His major duties include contracts’ price, negotiation of terms and conditions, contractor evaluations and overseeing the operation of PCS’s warehouses. He holds an MSc Mechanical Engineering from National University of Singapore.

Person experienced in financial matters in Singapore

Tan Chian Khong
Tan Chian Khong is a Fellow of the Institute of Singapore Chartered Accountants. He is an independent director of Alliance Bank Malaysia Berhad, Straits Trading Company Limited and Xinghua Port Holdings Ltd. Mr Tan is also a board member of the Casino Regulatory Authority, Methodist Welfare Services and a director of Trailblazer Foundation Ltd. He was a partner at Ernst & Young LLP, and has approximately 35 years of experience in the audit industry.