There is no hard and fast rule to use the SBOK. Although anyone interested in Scrum can use this Book of Knowledge as a guide towards understanding Scrum with its intricate details.
The SBOK™ can be used as a reference and knowledge guide by both experienced Scrum and other product and service development practitioners, as well as by persons with no prior experience or knowledge of Scrum or project management methodology. The contents are organized for easy reference by the three Scrum Core Team roles: Scrum Master, Product Owner, and Scrum Team.
The phases covering the six Scrum principles and five Scrum aspects include a Roles Guide. This guide provides direction regarding the relevance of each section in the chapter to the Scrum Core Team roles.
In order to facilitate the best application of the Scrum framework, the SBOK™ has clearly differentiated mandatory inputs, tools, and outputs, from non-mandatory or optional ones. Inputs, tools, and outputs denoted by asterisks (*) are mandatory while others with no asterisks are optional. It is recommended that persons being introduced to Scrum focus primarily on the mandatory inputs, tools, and outputs, while more experienced practitioners should read the entire process phases.