This book introduces the reader to the relevant theories and principles that are necessary for promoting quality legislation in the field of legislative drafting.The first of these principles is the necessity for a regulatory framework for legislative drafting as a holistic platform for promoting quality legislation. Closely related is the principle of effectiveness of legislation as the paramount goal in legislative drafting. By combining these two fundamental principles this book demonstrates how legislative drafters can improve the quality of legislation.The purpose of this book is not to lay down any hard-and-fast rules but to introduce the reader to principles derived from legislative drafting in the dominant jurisdictions of the common law, civil law and the European Union law.Using legislative drafting in Nigeria as a case study, this book demonstrates how application of these principles can prove beneficial even in the most challenging jurisdiction. Examples from Nigeria’s oil and gas legislation have been chosen to illustrate the hypothesis. Oil and gas legislation have been chosen considering its transnational nature and pervasive impact on the economy.