Price Books use specialized access semantics rather than the same generic sharing pattern as ordinary business objects. The High Risk Price Book should be the authorization boundary for the sensitive product catalog. UC can maintain broad View Only access where users need to inspect pricing while explicitly sharing the High Risk Price Book with trained staff at the level required to use it during the Opportunity sales process. Users need appropriate Price Book use access to select that Price Book and add its products to an Opportunity. This approach keeps the high-risk product entitlement centralized in the pricing catalog instead of trying to enforce it through page layouts, validation rules, or a broad Opportunity permission. Standard sharing rules are not the normal way to express this Price Book access model, and a solution that grants the entitlement to all sales users would violate the requirement. The architecture should pair the specialized Price Book access with normal Opportunity and Product permissions so only the trained population can transact with the restricted products. Study Guide reference: Access to Other Data - Price Book security, View Only, Use access, product visibility, pricing governance, and least-privilege sales access.