Think about guiding principles as a set of boundaries that are drawn. You can play within these boundaries and, at no cost, cross them. Well, to rephrase it, these are more like recommendations and not rules or policies that you are bound by. The nonprescriptive nature of ITIL is perhaps one of its strongest suits, and it continues the legacy with the guiding principles.
The concept of guiding principles is in fact new to ITIL. It started much later in 2016 with the ITIL Practitioner certification. To start with it had nine guiding principles, ...