BYOD policies are informally specified using natural language. We show how the SP4BYOD language can help reduce ambiguity in 5 BYOD policies and link the specification of a BYOD policy to its implementation. Using a formalisation of the 5 policies written in SP4BYOD, we make comparisons between them, and explore the delegation relationships within them. We identify that whilst policy acknowledgement is a key part of all 5 policies, this is not managed by existing MDM tools.