This comprehensive book addresses both the principles and the practicalities of petroleum unitization by mapping out the evolution of and rationale for unitization in legislation and by providing much-needed guidance on the formulation of a legislative framework for effective regulatory governance of the unitization process. Drawing on his own extensive experience of the global petroleum industry and his insights into petroleum unitization in some 90 jurisdictions worldwide, Paul F. Worthington discusses the key elements of legislation for incorporation into petroleum unitization statutes, implementing regulations and production contracts. He provides a basis for legal drafting at all levels of this tripartite legislative framework as well as guidelines for compliance with good international petroleum practice. The Law on Petroleum Unitization: Legislating for Effective Regulatory Governance will prove essential reading for legal practitioners working in government ministries with a responsibility for energy affairs as well as for energy regulators, energy companies and those legal firms who provide unitization advice. Petroleum consultancies, negotiators and energy policy advisers within professional bodies and academia will also benefit from this book's thorough and incisive treatment of the subject matter.